Home / 28,121.64-38,806.42-15,543.96

Finding the Fourth Proportional to 28,121.64, 38,806.42 and 15,543.96

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Solution

The fourth proportional to 28,121.64, 38,806.42 and 15,543.96 is: 21,449.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.64 : 38,806.42 = 15,543.96 : x
  2. Step 2: Convert to fraction form
    28,121.64/38,806.42 = 15,543.96/x
  3. Step 3: Cross multiply
    28,121.64x = 38,806.42 × 15,543.96
  4. Step 4: Simplify right side
    28,121.64x = 603,205,440.22
  5. Step 5: Solve for x
    x = 603,205,440.22/28,121.64
  6. Step 6: Final answer
    x = 21,449.87

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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.