Home / 20,854.60-28,781.37-11,903.42

Finding the Fourth Proportional to 20,854.60, 28,781.37 and 11,903.42

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Solution

The fourth proportional to 20,854.60, 28,781.37 and 11,903.42 is: 16,427.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,854.60 : 28,781.37 = 11,903.42 : x
  2. Step 2: Convert to fraction form
    20,854.60/28,781.37 = 11,903.42/x
  3. Step 3: Cross multiply
    20,854.60x = 28,781.37 × 11,903.42
  4. Step 4: Simplify right side
    20,854.60x = 342,596,807.24
  5. Step 5: Solve for x
    x = 342,596,807.24/20,854.60
  6. Step 6: Final answer
    x = 16,427.88

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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.