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Finding the Fourth Proportional to 19,879.92, 27,432.90 and 10,928.01

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Solution

The fourth proportional to 19,879.92, 27,432.90 and 10,928.01 is: 15,079.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,879.92 : 27,432.90 = 10,928.01 : x
  2. Step 2: Convert to fraction form
    19,879.92/27,432.90 = 10,928.01/x
  3. Step 3: Cross multiply
    19,879.92x = 27,432.90 × 10,928.01
  4. Step 4: Simplify right side
    19,879.92x = 299,787,005.53
  5. Step 5: Solve for x
    x = 299,787,005.53/19,879.92
  6. Step 6: Final answer
    x = 15,079.89

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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.