Home / 20,640.59-28,487.16-16,649.31

Finding the Fourth Proportional to 20,640.59, 28,487.16 and 16,649.31

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Solution

The fourth proportional to 20,640.59, 28,487.16 and 16,649.31 is: 22,978.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,640.59 : 28,487.16 = 16,649.31 : x
  2. Step 2: Convert to fraction form
    20,640.59/28,487.16 = 16,649.31/x
  3. Step 3: Cross multiply
    20,640.59x = 28,487.16 × 16,649.31
  4. Step 4: Simplify right side
    20,640.59x = 474,291,557.86
  5. Step 5: Solve for x
    x = 474,291,557.86/20,640.59
  6. Step 6: Final answer
    x = 22,978.59

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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.