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Finding the Fourth Proportional to 17,889.28, 24,687.36 and 9,931.20

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Solution

The fourth proportional to 17,889.28, 24,687.36 and 9,931.20 is: 13,705.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,889.28 : 24,687.36 = 9,931.20 : x
  2. Step 2: Convert to fraction form
    17,889.28/24,687.36 = 9,931.20/x
  3. Step 3: Cross multiply
    17,889.28x = 24,687.36 × 9,931.20
  4. Step 4: Simplify right side
    17,889.28x = 245,175,109.63
  5. Step 5: Solve for x
    x = 245,175,109.63/17,889.28
  6. Step 6: Final answer
    x = 13,705.14

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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.