Home / 15,895.80-21,909.78-11,171.88

Finding the Fourth Proportional to 15,895.80, 21,909.78 and 11,171.88

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Solution

The fourth proportional to 15,895.80, 21,909.78 and 11,171.88 is: 15,398.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,895.80 : 21,909.78 = 11,171.88 : x
  2. Step 2: Convert to fraction form
    15,895.80/21,909.78 = 11,171.88/x
  3. Step 3: Cross multiply
    15,895.80x = 21,909.78 × 11,171.88
  4. Step 4: Simplify right side
    15,895.80x = 244,773,432.99
  5. Step 5: Solve for x
    x = 244,773,432.99/15,895.80
  6. Step 6: Final answer
    x = 15,398.62

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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.