Home / 20,376.94-28,125.17-12,423.55

Finding the Fourth Proportional to 20,376.94, 28,125.17 and 12,423.55

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Solution

The fourth proportional to 20,376.94, 28,125.17 and 12,423.55 is: 17,147.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,376.94 : 28,125.17 = 12,423.55 : x
  2. Step 2: Convert to fraction form
    20,376.94/28,125.17 = 12,423.55/x
  3. Step 3: Cross multiply
    20,376.94x = 28,125.17 × 12,423.55
  4. Step 4: Simplify right side
    20,376.94x = 349,414,346.19
  5. Step 5: Solve for x
    x = 349,414,346.19/20,376.94
  6. Step 6: Final answer
    x = 17,147.54

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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.