Home / 20,979.78-28,952.64-11,548.92

Finding the Fourth Proportional to 20,979.78, 28,952.64 and 11,548.92

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Solution

The fourth proportional to 20,979.78, 28,952.64 and 11,548.92 is: 15,937.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,979.78 : 28,952.64 = 11,548.92 : x
  2. Step 2: Convert to fraction form
    20,979.78/28,952.64 = 11,548.92/x
  3. Step 3: Cross multiply
    20,979.78x = 28,952.64 × 11,548.92
  4. Step 4: Simplify right side
    20,979.78x = 334,371,723.15
  5. Step 5: Solve for x
    x = 334,371,723.15/20,979.78
  6. Step 6: Final answer
    x = 15,937.81

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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.