Home / 20,459.86-28,229.42-15,684.58

Finding the Fourth Proportional to 20,459.86, 28,229.42 and 15,684.58

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Solution

The fourth proportional to 20,459.86, 28,229.42 and 15,684.58 is: 21,640.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,459.86 : 28,229.42 = 15,684.58 : x
  2. Step 2: Convert to fraction form
    20,459.86/28,229.42 = 15,684.58/x
  3. Step 3: Cross multiply
    20,459.86x = 28,229.42 × 15,684.58
  4. Step 4: Simplify right side
    20,459.86x = 442,766,596.34
  5. Step 5: Solve for x
    x = 442,766,596.34/20,459.86
  6. Step 6: Final answer
    x = 21,640.74

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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.