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Finding the Fourth Proportional to 8,707.21, 11,980.23 and 8,462.18

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Solution

The fourth proportional to 8,707.21, 11,980.23 and 8,462.18 is: 11,643.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,707.21 : 11,980.23 = 8,462.18 : x
  2. Step 2: Convert to fraction form
    8,707.21/11,980.23 = 8,462.18/x
  3. Step 3: Cross multiply
    8,707.21x = 11,980.23 × 8,462.18
  4. Step 4: Simplify right side
    8,707.21x = 101,378,862.70
  5. Step 5: Solve for x
    x = 101,378,862.70/8,707.21
  6. Step 6: Final answer
    x = 11,643.10

Related Problems

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Half scale
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Double scale
Find fourth proportional to 8,708.21, 11,981.61 and 8,463.18
Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.