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Finding the Fourth Proportional to 15,060.88, 20,783.45 and 8,687.73

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Solution

The fourth proportional to 15,060.88, 20,783.45 and 8,687.73 is: 11,988.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,060.88 : 20,783.45 = 8,687.73 : x
  2. Step 2: Convert to fraction form
    15,060.88/20,783.45 = 8,687.73/x
  3. Step 3: Cross multiply
    15,060.88x = 20,783.45 × 8,687.73
  4. Step 4: Simplify right side
    15,060.88x = 180,561,002.07
  5. Step 5: Solve for x
    x = 180,561,002.07/15,060.88
  6. Step 6: Final answer
    x = 11,988.74

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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.