Home / 20,986.56-28,972.16-16,195.74

Finding the Fourth Proportional to 20,986.56, 28,972.16 and 16,195.74

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Solution

The fourth proportional to 20,986.56, 28,972.16 and 16,195.74 is: 22,358.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,986.56 : 28,972.16 = 16,195.74 : x
  2. Step 2: Convert to fraction form
    20,986.56/28,972.16 = 16,195.74/x
  3. Step 3: Cross multiply
    20,986.56x = 28,972.16 × 16,195.74
  4. Step 4: Simplify right side
    20,986.56x = 469,225,489.62
  5. Step 5: Solve for x
    x = 469,225,489.62/20,986.56
  6. Step 6: Final answer
    x = 22,358.38

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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.