Home / 10,354.30-15,531.45-3,428.80

Finding the Fourth Proportional to 10,354.30, 15,531.45 and 3,428.80

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Solution

The fourth proportional to 10,354.30, 15,531.45 and 3,428.80 is: 5,143.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,354.30 : 15,531.45 = 3,428.80 : x
  2. Step 2: Convert to fraction form
    10,354.30/15,531.45 = 3,428.80/x
  3. Step 3: Cross multiply
    10,354.30x = 15,531.45 × 3,428.80
  4. Step 4: Simplify right side
    10,354.30x = 53,254,235.76
  5. Step 5: Solve for x
    x = 53,254,235.76/10,354.30
  6. Step 6: Final answer
    x = 5,143.20

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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.