Home / 18,320.72-27,456.78-9,979.34

Finding the Fourth Proportional to 18,320.72, 27,456.78 and 9,979.34

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Solution

The fourth proportional to 18,320.72, 27,456.78 and 9,979.34 is: 14,955.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,320.72 : 27,456.78 = 9,979.34 : x
  2. Step 2: Convert to fraction form
    18,320.72/27,456.78 = 9,979.34/x
  3. Step 3: Cross multiply
    18,320.72x = 27,456.78 × 9,979.34
  4. Step 4: Simplify right side
    18,320.72x = 274,000,542.93
  5. Step 5: Solve for x
    x = 274,000,542.93/18,320.72
  6. Step 6: Final answer
    x = 14,955.77

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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.