Home / 26,187.75-36,139.10-15,009.75

Finding the Fourth Proportional to 26,187.75, 36,139.10 and 15,009.75

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Solution

The fourth proportional to 26,187.75, 36,139.10 and 15,009.75 is: 20,713.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,187.75 : 36,139.10 = 15,009.75 : x
  2. Step 2: Convert to fraction form
    26,187.75/36,139.10 = 15,009.75/x
  3. Step 3: Cross multiply
    26,187.75x = 36,139.10 × 15,009.75
  4. Step 4: Simplify right side
    26,187.75x = 542,438,781.18
  5. Step 5: Solve for x
    x = 542,438,781.18/26,187.75
  6. Step 6: Final answer
    x = 20,713.46

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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.