Home / 20,572.80-28,390.40-11,141.36

Finding the Fourth Proportional to 20,572.80, 28,390.40 and 11,141.36

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Solution

The fourth proportional to 20,572.80, 28,390.40 and 11,141.36 is: 15,375.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,572.80 : 28,390.40 = 11,141.36 : x
  2. Step 2: Convert to fraction form
    20,572.80/28,390.40 = 11,141.36/x
  3. Step 3: Cross multiply
    20,572.80x = 28,390.40 × 11,141.36
  4. Step 4: Simplify right side
    20,572.80x = 316,307,666.94
  5. Step 5: Solve for x
    x = 316,307,666.94/20,572.80
  6. Step 6: Final answer
    x = 15,375.04

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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.