Home / 28,381.20-39,162.64-16,442.88

Finding the Fourth Proportional to 28,381.20, 39,162.64 and 16,442.88

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Solution

The fourth proportional to 28,381.20, 39,162.64 and 16,442.88 is: 22,689.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,381.20 : 39,162.64 = 16,442.88 : x
  2. Step 2: Convert to fraction form
    28,381.20/39,162.64 = 16,442.88/x
  3. Step 3: Cross multiply
    28,381.20x = 39,162.64 × 16,442.88
  4. Step 4: Simplify right side
    28,381.20x = 643,946,590.00
  5. Step 5: Solve for x
    x = 643,946,590.00/28,381.20
  6. Step 6: Final answer
    x = 22,689.20

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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.