Home / 28,217.28-38,942.64-15,644.46

Finding the Fourth Proportional to 28,217.28, 38,942.64 and 15,644.46

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Solution

The fourth proportional to 28,217.28, 38,942.64 and 15,644.46 is: 21,590.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,217.28 : 38,942.64 = 15,644.46 : x
  2. Step 2: Convert to fraction form
    28,217.28/38,942.64 = 15,644.46/x
  3. Step 3: Cross multiply
    28,217.28x = 38,942.64 × 15,644.46
  4. Step 4: Simplify right side
    28,217.28x = 609,236,573.77
  5. Step 5: Solve for x
    x = 609,236,573.77/28,217.28
  6. Step 6: Final answer
    x = 21,590.90

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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.