Home / 15,401.12-21,253.48-8,686.70

Finding the Fourth Proportional to 15,401.12, 21,253.48 and 8,686.70

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Solution

The fourth proportional to 15,401.12, 21,253.48 and 8,686.70 is: 11,987.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,401.12 : 21,253.48 = 8,686.70 : x
  2. Step 2: Convert to fraction form
    15,401.12/21,253.48 = 8,686.70/x
  3. Step 3: Cross multiply
    15,401.12x = 21,253.48 × 8,686.70
  4. Step 4: Simplify right side
    15,401.12x = 184,622,604.72
  5. Step 5: Solve for x
    x = 184,622,604.72/15,401.12
  6. Step 6: Final answer
    x = 11,987.61

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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.