Home / 20,722.52-28,608.46-15,429.98

Finding the Fourth Proportional to 20,722.52, 28,608.46 and 15,429.98

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Solution

The fourth proportional to 20,722.52, 28,608.46 and 15,429.98 is: 21,301.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,722.52 : 28,608.46 = 15,429.98 : x
  2. Step 2: Convert to fraction form
    20,722.52/28,608.46 = 15,429.98/x
  3. Step 3: Cross multiply
    20,722.52x = 28,608.46 × 15,429.98
  4. Step 4: Simplify right side
    20,722.52x = 441,427,965.63
  5. Step 5: Solve for x
    x = 441,427,965.63/20,722.52
  6. Step 6: Final answer
    x = 21,301.85

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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.