Home / 5,390.15-7,438.34-3,000.47

Finding the Fourth Proportional to 5,390.15, 7,438.34 and 3,000.47

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Solution

The fourth proportional to 5,390.15, 7,438.34 and 3,000.47 is: 4,140.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,390.15 : 7,438.34 = 3,000.47 : x
  2. Step 2: Convert to fraction form
    5,390.15/7,438.34 = 3,000.47/x
  3. Step 3: Cross multiply
    5,390.15x = 7,438.34 × 3,000.47
  4. Step 4: Simplify right side
    5,390.15x = 22,318,542.12
  5. Step 5: Solve for x
    x = 22,318,542.12/5,390.15
  6. Step 6: Final answer
    x = 4,140.61

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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.