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Finding the Fourth Proportional to 20,011.59, 27,615.87 and 11,397.87

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Solution

The fourth proportional to 20,011.59, 27,615.87 and 11,397.87 is: 15,728.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,011.59 : 27,615.87 = 11,397.87 : x
  2. Step 2: Convert to fraction form
    20,011.59/27,615.87 = 11,397.87/x
  3. Step 3: Cross multiply
    20,011.59x = 27,615.87 × 11,397.87
  4. Step 4: Simplify right side
    20,011.59x = 314,762,096.20
  5. Step 5: Solve for x
    x = 314,762,096.20/20,011.59
  6. Step 6: Final answer
    x = 15,728.99

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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.