Home / 15,494.13-21,381.82-8,781.03

Finding the Fourth Proportional to 15,494.13, 21,381.82 and 8,781.03

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Solution

The fourth proportional to 15,494.13, 21,381.82 and 8,781.03 is: 12,117.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,494.13 : 21,381.82 = 8,781.03 : x
  2. Step 2: Convert to fraction form
    15,494.13/21,381.82 = 8,781.03/x
  3. Step 3: Cross multiply
    15,494.13x = 21,381.82 × 8,781.03
  4. Step 4: Simplify right side
    15,494.13x = 187,754,380.92
  5. Step 5: Solve for x
    x = 187,754,380.92/15,494.13
  6. Step 6: Final answer
    x = 12,117.77

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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.