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Finding the Fourth Proportional to 19,881.24, 27,436.08 and 10,929.30

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Solution

The fourth proportional to 19,881.24, 27,436.08 and 10,929.30 is: 15,082.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,881.24 : 27,436.08 = 10,929.30 : x
  2. Step 2: Convert to fraction form
    19,881.24/27,436.08 = 10,929.30/x
  3. Step 3: Cross multiply
    19,881.24x = 27,436.08 × 10,929.30
  4. Step 4: Simplify right side
    19,881.24x = 299,857,149.14
  5. Step 5: Solve for x
    x = 299,857,149.14/19,881.24
  6. Step 6: Final answer
    x = 15,082.42

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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.