Home / 8,240.13-11,372.33-7,981.74

Finding the Fourth Proportional to 8,240.13, 11,372.33 and 7,981.74

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Solution

The fourth proportional to 8,240.13, 11,372.33 and 7,981.74 is: 11,015.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,240.13 : 11,372.33 = 7,981.74 : x
  2. Step 2: Convert to fraction form
    8,240.13/11,372.33 = 7,981.74/x
  3. Step 3: Cross multiply
    8,240.13x = 11,372.33 × 7,981.74
  4. Step 4: Simplify right side
    8,240.13x = 90,771,001.21
  5. Step 5: Solve for x
    x = 90,771,001.21/8,240.13
  6. Step 6: Final answer
    x = 11,015.72

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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.