Home / 5,487.39-7,572.20-3,390.75

Finding the Fourth Proportional to 5,487.39, 7,572.20 and 3,390.75

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Solution

The fourth proportional to 5,487.39, 7,572.20 and 3,390.75 is: 4,678.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,487.39 : 7,572.20 = 3,390.75 : x
  2. Step 2: Convert to fraction form
    5,487.39/7,572.20 = 3,390.75/x
  3. Step 3: Cross multiply
    5,487.39x = 7,572.20 × 3,390.75
  4. Step 4: Simplify right side
    5,487.39x = 25,675,420.20
  5. Step 5: Solve for x
    x = 25,675,420.20/5,487.39
  6. Step 6: Final answer
    x = 4,678.99

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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.