Home / 21,165.60-29,212.35-12,211.86

Finding the Fourth Proportional to 21,165.60, 29,212.35 and 12,211.86

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Solution

The fourth proportional to 21,165.60, 29,212.35 and 12,211.86 is: 16,854.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,165.60 : 29,212.35 = 12,211.86 : x
  2. Step 2: Convert to fraction form
    21,165.60/29,212.35 = 12,211.86/x
  3. Step 3: Cross multiply
    21,165.60x = 29,212.35 × 12,211.86
  4. Step 4: Simplify right side
    21,165.60x = 356,737,128.47
  5. Step 5: Solve for x
    x = 356,737,128.47/21,165.60
  6. Step 6: Final answer
    x = 16,854.57

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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.