Home / 28,239.92-38,967-18,169.28

Finding the Fourth Proportional to 28,239.92, 38,967 and 18,169.28

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Solution

The fourth proportional to 28,239.92, 38,967 and 18,169.28 is: 25,070.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,239.92 : 38,967 = 18,169.28 : x
  2. Step 2: Convert to fraction form
    28,239.92/38,967 = 18,169.28/x
  3. Step 3: Cross multiply
    28,239.92x = 38,967 × 18,169.28
  4. Step 4: Simplify right side
    28,239.92x = 708,002,333.76
  5. Step 5: Solve for x
    x = 708,002,333.76/28,239.92
  6. Step 6: Final answer
    x = 25,070.98

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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.