Home / 20,117.90-30,187.65-8,432.30

Finding the Fourth Proportional to 20,117.90, 30,187.65 and 8,432.30

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Solution

The fourth proportional to 20,117.90, 30,187.65 and 8,432.30 is: 12,652.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,117.90 : 30,187.65 = 8,432.30 : x
  2. Step 2: Convert to fraction form
    20,117.90/30,187.65 = 8,432.30/x
  3. Step 3: Cross multiply
    20,117.90x = 30,187.65 × 8,432.30
  4. Step 4: Simplify right side
    20,117.90x = 254,551,321.10
  5. Step 5: Solve for x
    x = 254,551,321.10/20,117.90
  6. Step 6: Final answer
    x = 12,652.98

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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.