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Finding the Fourth Proportional to 7,862.32, 11,781.89 and 5,878.64

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Solution

The fourth proportional to 7,862.32, 11,781.89 and 5,878.64 is: 8,809.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,862.32 : 11,781.89 = 5,878.64 : x
  2. Step 2: Convert to fraction form
    7,862.32/11,781.89 = 5,878.64/x
  3. Step 3: Cross multiply
    7,862.32x = 11,781.89 × 5,878.64
  4. Step 4: Simplify right side
    7,862.32x = 69,261,489.83
  5. Step 5: Solve for x
    x = 69,261,489.83/7,862.32
  6. Step 6: Final answer
    x = 8,809.29

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.