Home / 20,652.20-28,500.15-12,699.62

Finding the Fourth Proportional to 20,652.20, 28,500.15 and 12,699.62

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Solution

The fourth proportional to 20,652.20, 28,500.15 and 12,699.62 is: 17,525.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,652.20 : 28,500.15 = 12,699.62 : x
  2. Step 2: Convert to fraction form
    20,652.20/28,500.15 = 12,699.62/x
  3. Step 3: Cross multiply
    20,652.20x = 28,500.15 × 12,699.62
  4. Step 4: Simplify right side
    20,652.20x = 361,941,074.94
  5. Step 5: Solve for x
    x = 361,941,074.94/20,652.20
  6. Step 6: Final answer
    x = 17,525.55

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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.