Home / 20,925.12-28,877.31-11,493.66

Finding the Fourth Proportional to 20,925.12, 28,877.31 and 11,493.66

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Solution

The fourth proportional to 20,925.12, 28,877.31 and 11,493.66 is: 15,861.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,925.12 : 28,877.31 = 11,493.66 : x
  2. Step 2: Convert to fraction form
    20,925.12/28,877.31 = 11,493.66/x
  3. Step 3: Cross multiply
    20,925.12x = 28,877.31 × 11,493.66
  4. Step 4: Simplify right side
    20,925.12x = 331,905,982.85
  5. Step 5: Solve for x
    x = 331,905,982.85/20,925.12
  6. Step 6: Final answer
    x = 15,861.60

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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.