Home / 20,135.20-30,188.40-9,032.80

Finding the Fourth Proportional to 20,135.20, 30,188.40 and 9,032.80

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Solution

The fourth proportional to 20,135.20, 30,188.40 and 9,032.80 is: 13,542.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,135.20 : 30,188.40 = 9,032.80 : x
  2. Step 2: Convert to fraction form
    20,135.20/30,188.40 = 9,032.80/x
  3. Step 3: Cross multiply
    20,135.20x = 30,188.40 × 9,032.80
  4. Step 4: Simplify right side
    20,135.20x = 272,685,779.52
  5. Step 5: Solve for x
    x = 272,685,779.52/20,135.20
  6. Step 6: Final answer
    x = 13,542.74

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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.