Home / 21,124.11-29,157.75-12,177.58

Finding the Fourth Proportional to 21,124.11, 29,157.75 and 12,177.58

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Solution

The fourth proportional to 21,124.11, 29,157.75 and 12,177.58 is: 16,808.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,124.11 : 29,157.75 = 12,177.58 : x
  2. Step 2: Convert to fraction form
    21,124.11/29,157.75 = 12,177.58/x
  3. Step 3: Cross multiply
    21,124.11x = 29,157.75 × 12,177.58
  4. Step 4: Simplify right side
    21,124.11x = 355,070,833.25
  5. Step 5: Solve for x
    x = 355,070,833.25/21,124.11
  6. Step 6: Final answer
    x = 16,808.79

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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.