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Finding the Fourth Proportional to 13,951.92, 19,248.90 and 7,979.32

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Solution

The fourth proportional to 13,951.92, 19,248.90 and 7,979.32 is: 11,008.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,951.92 : 19,248.90 = 7,979.32 : x
  2. Step 2: Convert to fraction form
    13,951.92/19,248.90 = 7,979.32/x
  3. Step 3: Cross multiply
    13,951.92x = 19,248.90 × 7,979.32
  4. Step 4: Simplify right side
    13,951.92x = 153,593,132.75
  5. Step 5: Solve for x
    x = 153,593,132.75/13,951.92
  6. Step 6: Final answer
    x = 11,008.75

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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.