Home / 15,877.54-21,911.16-9,909.28

Finding the Fourth Proportional to 15,877.54, 21,911.16 and 9,909.28

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Solution

The fourth proportional to 15,877.54, 21,911.16 and 9,909.28 is: 13,674.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,877.54 : 21,911.16 = 9,909.28 : x
  2. Step 2: Convert to fraction form
    15,877.54/21,911.16 = 9,909.28/x
  3. Step 3: Cross multiply
    15,877.54x = 21,911.16 × 9,909.28
  4. Step 4: Simplify right side
    15,877.54x = 217,123,819.56
  5. Step 5: Solve for x
    x = 217,123,819.56/15,877.54
  6. Step 6: Final answer
    x = 13,674.90

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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.