Home / 15,339.85-21,162.06-9,670.66

Finding the Fourth Proportional to 15,339.85, 21,162.06 and 9,670.66

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Solution

The fourth proportional to 15,339.85, 21,162.06 and 9,670.66 is: 13,341.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,339.85 : 21,162.06 = 9,670.66 : x
  2. Step 2: Convert to fraction form
    15,339.85/21,162.06 = 9,670.66/x
  3. Step 3: Cross multiply
    15,339.85x = 21,162.06 × 9,670.66
  4. Step 4: Simplify right side
    15,339.85x = 204,651,087.16
  5. Step 5: Solve for x
    x = 204,651,087.16/15,339.85
  6. Step 6: Final answer
    x = 13,341.14

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Half scale
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Double scale
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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.