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Finding the Fourth Proportional to 12,697.21, 17,522.13 and 7,108.21

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Solution

The fourth proportional to 12,697.21, 17,522.13 and 7,108.21 is: 9,809.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,697.21 : 17,522.13 = 7,108.21 : x
  2. Step 2: Convert to fraction form
    12,697.21/17,522.13 = 7,108.21/x
  3. Step 3: Cross multiply
    12,697.21x = 17,522.13 × 7,108.21
  4. Step 4: Simplify right side
    12,697.21x = 124,550,979.69
  5. Step 5: Solve for x
    x = 124,550,979.69/12,697.21
  6. Step 6: Final answer
    x = 9,809.32

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Half scale
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Double scale
Find fourth proportional to 12,698.21, 17,523.51 and 7,109.21
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.