Home / 5,390.17-7,438.50-3,151.53

Finding the Fourth Proportional to 5,390.17, 7,438.50 and 3,151.53

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Solution

The fourth proportional to 5,390.17, 7,438.50 and 3,151.53 is: 4,349.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.17 : 7,438.50 = 3,151.53 : x
  2. Step 2: Convert to fraction form
    5,390.17/7,438.50 = 3,151.53/x
  3. Step 3: Cross multiply
    5,390.17x = 7,438.50 × 3,151.53
  4. Step 4: Simplify right side
    5,390.17x = 23,442,655.91
  5. Step 5: Solve for x
    x = 23,442,655.91/5,390.17
  6. Step 6: Final answer
    x = 4,349.15

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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.