Home / 26,979.60-37,191.24-21,000.72

Finding the Fourth Proportional to 26,979.60, 37,191.24 and 21,000.72

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Solution

The fourth proportional to 26,979.60, 37,191.24 and 21,000.72 is: 28,949.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,979.60 : 37,191.24 = 21,000.72 : x
  2. Step 2: Convert to fraction form
    26,979.60/37,191.24 = 21,000.72/x
  3. Step 3: Cross multiply
    26,979.60x = 37,191.24 × 21,000.72
  4. Step 4: Simplify right side
    26,979.60x = 781,042,817.69
  5. Step 5: Solve for x
    x = 781,042,817.69/26,979.60
  6. Step 6: Final answer
    x = 28,949.38

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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.