Home / 20,870.66-28,778.34-16,079.92

Finding the Fourth Proportional to 20,870.66, 28,778.34 and 16,079.92

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Solution

The fourth proportional to 20,870.66, 28,778.34 and 16,079.92 is: 22,172.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,870.66 : 28,778.34 = 16,079.92 : x
  2. Step 2: Convert to fraction form
    20,870.66/28,778.34 = 16,079.92/x
  3. Step 3: Cross multiply
    20,870.66x = 28,778.34 × 16,079.92
  4. Step 4: Simplify right side
    20,870.66x = 462,753,302.84
  5. Step 5: Solve for x
    x = 462,753,302.84/20,870.66
  6. Step 6: Final answer
    x = 22,172.43

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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.