Home / 7,128.60-10,691.28-3,428.52

Finding the Fourth Proportional to 7,128.60, 10,691.28 and 3,428.52

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Solution

The fourth proportional to 7,128.60, 10,691.28 and 3,428.52 is: 5,142.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,128.60 : 10,691.28 = 3,428.52 : x
  2. Step 2: Convert to fraction form
    7,128.60/10,691.28 = 3,428.52/x
  3. Step 3: Cross multiply
    7,128.60x = 10,691.28 × 3,428.52
  4. Step 4: Simplify right side
    7,128.60x = 36,655,267.31
  5. Step 5: Solve for x
    x = 36,655,267.31/7,128.60
  6. Step 6: Final answer
    x = 5,142.00

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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.