Home / 26,105.80-39,129.90-11,312.20

Finding the Fourth Proportional to 26,105.80, 39,129.90 and 11,312.20

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Solution

The fourth proportional to 26,105.80, 39,129.90 and 11,312.20 is: 16,955.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,105.80 : 39,129.90 = 11,312.20 : x
  2. Step 2: Convert to fraction form
    26,105.80/39,129.90 = 11,312.20/x
  3. Step 3: Cross multiply
    26,105.80x = 39,129.90 × 11,312.20
  4. Step 4: Simplify right side
    26,105.80x = 442,645,254.78
  5. Step 5: Solve for x
    x = 442,645,254.78/26,105.80
  6. Step 6: Final answer
    x = 16,955.82

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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.