Home / 8,145.60-11,224.80-5,781.12

Finding the Fourth Proportional to 8,145.60, 11,224.80 and 5,781.12

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Solution

The fourth proportional to 8,145.60, 11,224.80 and 5,781.12 is: 7,966.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,145.60 : 11,224.80 = 5,781.12 : x
  2. Step 2: Convert to fraction form
    8,145.60/11,224.80 = 5,781.12/x
  3. Step 3: Cross multiply
    8,145.60x = 11,224.80 × 5,781.12
  4. Step 4: Simplify right side
    8,145.60x = 64,891,915.78
  5. Step 5: Solve for x
    x = 64,891,915.78/8,145.60
  6. Step 6: Final answer
    x = 7,966.50

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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.