Home / 27,999.20-38,638.88-15,423.95

Finding the Fourth Proportional to 27,999.20, 38,638.88 and 15,423.95

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Solution

The fourth proportional to 27,999.20, 38,638.88 and 15,423.95 is: 21,285.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,999.20 : 38,638.88 = 15,423.95 : x
  2. Step 2: Convert to fraction form
    27,999.20/38,638.88 = 15,423.95/x
  3. Step 3: Cross multiply
    27,999.20x = 38,638.88 × 15,423.95
  4. Step 4: Simplify right side
    27,999.20x = 595,963,882.86
  5. Step 5: Solve for x
    x = 595,963,882.86/27,999.20
  6. Step 6: Final answer
    x = 21,285.04

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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.