Home / 21,518.19-29,695.11-12,086.75

Finding the Fourth Proportional to 21,518.19, 29,695.11 and 12,086.75

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Solution

The fourth proportional to 21,518.19, 29,695.11 and 12,086.75 is: 16,679.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,518.19 : 29,695.11 = 12,086.75 : x
  2. Step 2: Convert to fraction form
    21,518.19/29,695.11 = 12,086.75/x
  3. Step 3: Cross multiply
    21,518.19x = 29,695.11 × 12,086.75
  4. Step 4: Simplify right side
    21,518.19x = 358,917,370.79
  5. Step 5: Solve for x
    x = 358,917,370.79/21,518.19
  6. Step 6: Final answer
    x = 16,679.72

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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.