Home / 20,423.82-28,182.75-13,708.08

Finding the Fourth Proportional to 20,423.82, 28,182.75 and 13,708.08

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Solution

The fourth proportional to 20,423.82, 28,182.75 and 13,708.08 is: 18,915.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,423.82 : 28,182.75 = 13,708.08 : x
  2. Step 2: Convert to fraction form
    20,423.82/28,182.75 = 13,708.08/x
  3. Step 3: Cross multiply
    20,423.82x = 28,182.75 × 13,708.08
  4. Step 4: Simplify right side
    20,423.82x = 386,331,391.62
  5. Step 5: Solve for x
    x = 386,331,391.62/20,423.82
  6. Step 6: Final answer
    x = 18,915.73

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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.