Home / 15,143.30-20,895.25-8,428.75

Finding the Fourth Proportional to 15,143.30, 20,895.25 and 8,428.75

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Solution

The fourth proportional to 15,143.30, 20,895.25 and 8,428.75 is: 11,630.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,143.30 : 20,895.25 = 8,428.75 : x
  2. Step 2: Convert to fraction form
    15,143.30/20,895.25 = 8,428.75/x
  3. Step 3: Cross multiply
    15,143.30x = 20,895.25 × 8,428.75
  4. Step 4: Simplify right side
    15,143.30x = 176,120,691.82
  5. Step 5: Solve for x
    x = 176,120,691.82/15,143.30
  6. Step 6: Final answer
    x = 11,630.28

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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.