Home / 15,951.81-22,013.55-8,781.87

Finding the Fourth Proportional to 15,951.81, 22,013.55 and 8,781.87

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Solution

The fourth proportional to 15,951.81, 22,013.55 and 8,781.87 is: 12,119.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,951.81 : 22,013.55 = 8,781.87 : x
  2. Step 2: Convert to fraction form
    15,951.81/22,013.55 = 8,781.87/x
  3. Step 3: Cross multiply
    15,951.81x = 22,013.55 × 8,781.87
  4. Step 4: Simplify right side
    15,951.81x = 193,320,134.34
  5. Step 5: Solve for x
    x = 193,320,134.34/15,951.81
  6. Step 6: Final answer
    x = 12,119.01

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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.