Home / 20,877.14-28,810.32-11,445.69

Finding the Fourth Proportional to 20,877.14, 28,810.32 and 11,445.69

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Solution

The fourth proportional to 20,877.14, 28,810.32 and 11,445.69 is: 15,794.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.14 : 28,810.32 = 11,445.69 : x
  2. Step 2: Convert to fraction form
    20,877.14/28,810.32 = 11,445.69/x
  3. Step 3: Cross multiply
    20,877.14x = 28,810.32 × 11,445.69
  4. Step 4: Simplify right side
    20,877.14x = 329,753,991.52
  5. Step 5: Solve for x
    x = 329,753,991.52/20,877.14
  6. Step 6: Final answer
    x = 15,794.98

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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.