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Finding the Fourth Proportional to 15,074.31, 20,802.15 and 8,359.92

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Solution

The fourth proportional to 15,074.31, 20,802.15 and 8,359.92 is: 11,536.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,074.31 : 20,802.15 = 8,359.92 : x
  2. Step 2: Convert to fraction form
    15,074.31/20,802.15 = 8,359.92/x
  3. Step 3: Cross multiply
    15,074.31x = 20,802.15 × 8,359.92
  4. Step 4: Simplify right side
    15,074.31x = 173,904,309.83
  5. Step 5: Solve for x
    x = 173,904,309.83/15,074.31
  6. Step 6: Final answer
    x = 11,536.47

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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.