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Finding the Fourth Proportional to 15,061.92, 20,784.51 and 8,347.16

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Solution

The fourth proportional to 15,061.92, 20,784.51 and 8,347.16 is: 11,518.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,061.92 : 20,784.51 = 8,347.16 : x
  2. Step 2: Convert to fraction form
    15,061.92/20,784.51 = 8,347.16/x
  3. Step 3: Cross multiply
    15,061.92x = 20,784.51 × 8,347.16
  4. Step 4: Simplify right side
    15,061.92x = 173,491,526.57
  5. Step 5: Solve for x
    x = 173,491,526.57/15,061.92
  6. Step 6: Final answer
    x = 11,518.55

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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.