Home / 20,458.10-30,687.15-18,902.90

Finding the Fourth Proportional to 20,458.10, 30,687.15 and 18,902.90

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Solution

The fourth proportional to 20,458.10, 30,687.15 and 18,902.90 is: 28,354.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,458.10 : 30,687.15 = 18,902.90 : x
  2. Step 2: Convert to fraction form
    20,458.10/30,687.15 = 18,902.90/x
  3. Step 3: Cross multiply
    20,458.10x = 30,687.15 × 18,902.90
  4. Step 4: Simplify right side
    20,458.10x = 580,076,127.74
  5. Step 5: Solve for x
    x = 580,076,127.74/20,458.10
  6. Step 6: Final answer
    x = 28,354.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.