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Finding the Fourth Proportional to 15,061.88, 20,784.83 and 8,688.73

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Solution

The fourth proportional to 15,061.88, 20,784.83 and 8,688.73 is: 11,990.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,061.88 : 20,784.83 = 8,688.73 : x
  2. Step 2: Convert to fraction form
    15,061.88/20,784.83 = 8,688.73/x
  3. Step 3: Cross multiply
    15,061.88x = 20,784.83 × 8,688.73
  4. Step 4: Simplify right side
    15,061.88x = 180,593,775.97
  5. Step 5: Solve for x
    x = 180,593,775.97/15,061.88
  6. Step 6: Final answer
    x = 11,990.12

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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.