Home / 6,439.38-8,887.65-3,645.78

Finding the Fourth Proportional to 6,439.38, 8,887.65 and 3,645.78

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Solution

The fourth proportional to 6,439.38, 8,887.65 and 3,645.78 is: 5,031.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,439.38 : 8,887.65 = 3,645.78 : x
  2. Step 2: Convert to fraction form
    6,439.38/8,887.65 = 3,645.78/x
  3. Step 3: Cross multiply
    6,439.38x = 8,887.65 × 3,645.78
  4. Step 4: Simplify right side
    6,439.38x = 32,402,416.62
  5. Step 5: Solve for x
    x = 32,402,416.62/6,439.38
  6. Step 6: Final answer
    x = 5,031.92

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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.