Home / 26,979.12-40,442.40-12,191.76

Finding the Fourth Proportional to 26,979.12, 40,442.40 and 12,191.76

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Solution

The fourth proportional to 26,979.12, 40,442.40 and 12,191.76 is: 18,275.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,979.12 : 40,442.40 = 12,191.76 : x
  2. Step 2: Convert to fraction form
    26,979.12/40,442.40 = 12,191.76/x
  3. Step 3: Cross multiply
    26,979.12x = 40,442.40 × 12,191.76
  4. Step 4: Simplify right side
    26,979.12x = 493,064,034.62
  5. Step 5: Solve for x
    x = 493,064,034.62/26,979.12
  6. Step 6: Final answer
    x = 18,275.76

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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.