Home / 20,861.15-28,778.73-18,473.55

Finding the Fourth Proportional to 20,861.15, 28,778.73 and 18,473.55

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Solution

The fourth proportional to 20,861.15, 28,778.73 and 18,473.55 is: 25,484.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.15 : 28,778.73 = 18,473.55 : x
  2. Step 2: Convert to fraction form
    20,861.15/28,778.73 = 18,473.55/x
  3. Step 3: Cross multiply
    20,861.15x = 28,778.73 × 18,473.55
  4. Step 4: Simplify right side
    20,861.15x = 531,645,307.59
  5. Step 5: Solve for x
    x = 531,645,307.59/20,861.15
  6. Step 6: Final answer
    x = 25,484.95

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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.