Home / 15,401.28-21,253.66-8,686.97

Finding the Fourth Proportional to 15,401.28, 21,253.66 and 8,686.97

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Solution

The fourth proportional to 15,401.28, 21,253.66 and 8,686.97 is: 11,987.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,401.28 : 21,253.66 = 8,686.97 : x
  2. Step 2: Convert to fraction form
    15,401.28/21,253.66 = 8,686.97/x
  3. Step 3: Cross multiply
    15,401.28x = 21,253.66 × 8,686.97
  4. Step 4: Simplify right side
    15,401.28x = 184,629,800.54
  5. Step 5: Solve for x
    x = 184,629,800.54/15,401.28
  6. Step 6: Final answer
    x = 11,987.95

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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.