Home / 15,691.20-21,653.76-8,617.47

Finding the Fourth Proportional to 15,691.20, 21,653.76 and 8,617.47

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Solution

The fourth proportional to 15,691.20, 21,653.76 and 8,617.47 is: 11,892.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,691.20 : 21,653.76 = 8,617.47 : x
  2. Step 2: Convert to fraction form
    15,691.20/21,653.76 = 8,617.47/x
  3. Step 3: Cross multiply
    15,691.20x = 21,653.76 × 8,617.47
  4. Step 4: Simplify right side
    15,691.20x = 186,600,627.19
  5. Step 5: Solve for x
    x = 186,600,627.19/15,691.20
  6. Step 6: Final answer
    x = 11,892.06

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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.