Home / 8,585.28-12,875.76-7,125.12

Finding the Fourth Proportional to 8,585.28, 12,875.76 and 7,125.12

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Solution

The fourth proportional to 8,585.28, 12,875.76 and 7,125.12 is: 10,685.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,585.28 : 12,875.76 = 7,125.12 : x
  2. Step 2: Convert to fraction form
    8,585.28/12,875.76 = 7,125.12/x
  3. Step 3: Cross multiply
    8,585.28x = 12,875.76 × 7,125.12
  4. Step 4: Simplify right side
    8,585.28x = 91,741,335.09
  5. Step 5: Solve for x
    x = 91,741,335.09/8,585.28
  6. Step 6: Final answer
    x = 10,685.89

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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.