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Finding the Fourth Proportional to 20,079.99, 27,711.72 and 11,127.87

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Solution

The fourth proportional to 20,079.99, 27,711.72 and 11,127.87 is: 15,357.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,079.99 : 27,711.72 = 11,127.87 : x
  2. Step 2: Convert to fraction form
    20,079.99/27,711.72 = 11,127.87/x
  3. Step 3: Cross multiply
    20,079.99x = 27,711.72 × 11,127.87
  4. Step 4: Simplify right side
    20,079.99x = 308,372,417.64
  5. Step 5: Solve for x
    x = 308,372,417.64/20,079.99
  6. Step 6: Final answer
    x = 15,357.20

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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.