Home / 10,348.20-15,531.28-5,421.28

Finding the Fourth Proportional to 10,348.20, 15,531.28 and 5,421.28

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Solution

The fourth proportional to 10,348.20, 15,531.28 and 5,421.28 is: 8,136.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,348.20 : 15,531.28 = 5,421.28 : x
  2. Step 2: Convert to fraction form
    10,348.20/15,531.28 = 5,421.28/x
  3. Step 3: Cross multiply
    10,348.20x = 15,531.28 × 5,421.28
  4. Step 4: Simplify right side
    10,348.20x = 84,199,417.64
  5. Step 5: Solve for x
    x = 84,199,417.64/10,348.20
  6. Step 6: Final answer
    x = 8,136.62

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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.