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Finding the Fourth Proportional to 15,999.70, 23,979.15 and 8,979.70

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Solution

The fourth proportional to 15,999.70, 23,979.15 and 8,979.70 is: 13,458.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,999.70 : 23,979.15 = 8,979.70 : x
  2. Step 2: Convert to fraction form
    15,999.70/23,979.15 = 8,979.70/x
  3. Step 3: Cross multiply
    15,999.70x = 23,979.15 × 8,979.70
  4. Step 4: Simplify right side
    15,999.70x = 215,325,573.26
  5. Step 5: Solve for x
    x = 215,325,573.26/15,999.70
  6. Step 6: Final answer
    x = 13,458.10

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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.