Home / 21,827.18-30,125.12-12,876.87

Finding the Fourth Proportional to 21,827.18, 30,125.12 and 12,876.87

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Solution

The fourth proportional to 21,827.18, 30,125.12 and 12,876.87 is: 17,772.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,827.18 : 30,125.12 = 12,876.87 : x
  2. Step 2: Convert to fraction form
    21,827.18/30,125.12 = 12,876.87/x
  3. Step 3: Cross multiply
    21,827.18x = 30,125.12 × 12,876.87
  4. Step 4: Simplify right side
    21,827.18x = 387,917,189.59
  5. Step 5: Solve for x
    x = 387,917,189.59/21,827.18
  6. Step 6: Final answer
    x = 17,772.21

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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.