Home / 20,884.68-28,818-11,931.60

Finding the Fourth Proportional to 20,884.68, 28,818 and 11,931.60

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Solution

The fourth proportional to 20,884.68, 28,818 and 11,931.60 is: 16,463.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,884.68 : 28,818 = 11,931.60 : x
  2. Step 2: Convert to fraction form
    20,884.68/28,818 = 11,931.60/x
  3. Step 3: Cross multiply
    20,884.68x = 28,818 × 11,931.60
  4. Step 4: Simplify right side
    20,884.68x = 343,844,848.80
  5. Step 5: Solve for x
    x = 343,844,848.80/20,884.68
  6. Step 6: Final answer
    x = 16,463.97

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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.