Home / 27,979.20-42,001.20-16,898.40

Finding the Fourth Proportional to 27,979.20, 42,001.20 and 16,898.40

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Solution

The fourth proportional to 27,979.20, 42,001.20 and 16,898.40 is: 25,367.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,979.20 : 42,001.20 = 16,898.40 : x
  2. Step 2: Convert to fraction form
    27,979.20/42,001.20 = 16,898.40/x
  3. Step 3: Cross multiply
    27,979.20x = 42,001.20 × 16,898.40
  4. Step 4: Simplify right side
    27,979.20x = 709,753,078.08
  5. Step 5: Solve for x
    x = 709,753,078.08/27,979.20
  6. Step 6: Final answer
    x = 25,367.17

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.