Home / 20,420.74-28,183.17-12,463.30

Finding the Fourth Proportional to 20,420.74, 28,183.17 and 12,463.30

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Solution

The fourth proportional to 20,420.74, 28,183.17 and 12,463.30 is: 17,200.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,420.74 : 28,183.17 = 12,463.30 : x
  2. Step 2: Convert to fraction form
    20,420.74/28,183.17 = 12,463.30/x
  3. Step 3: Cross multiply
    20,420.74x = 28,183.17 × 12,463.30
  4. Step 4: Simplify right side
    20,420.74x = 351,255,302.66
  5. Step 5: Solve for x
    x = 351,255,302.66/20,420.74
  6. Step 6: Final answer
    x = 17,200.91

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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.