Home / 20,877.12-28,810.80-11,445.57

Finding the Fourth Proportional to 20,877.12, 28,810.80 and 11,445.57

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Solution

The fourth proportional to 20,877.12, 28,810.80 and 11,445.57 is: 15,795.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.12 : 28,810.80 = 11,445.57 : x
  2. Step 2: Convert to fraction form
    20,877.12/28,810.80 = 11,445.57/x
  3. Step 3: Cross multiply
    20,877.12x = 28,810.80 × 11,445.57
  4. Step 4: Simplify right side
    20,877.12x = 329,756,028.16
  5. Step 5: Solve for x
    x = 329,756,028.16/20,877.12
  6. Step 6: Final answer
    x = 15,795.09

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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.