Home / 28,120.66-38,806.50-15,373.89

Finding the Fourth Proportional to 28,120.66, 38,806.50 and 15,373.89

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Solution

The fourth proportional to 28,120.66, 38,806.50 and 15,373.89 is: 21,215.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,120.66 : 38,806.50 = 15,373.89 : x
  2. Step 2: Convert to fraction form
    28,120.66/38,806.50 = 15,373.89/x
  3. Step 3: Cross multiply
    28,120.66x = 38,806.50 × 15,373.89
  4. Step 4: Simplify right side
    28,120.66x = 596,606,862.29
  5. Step 5: Solve for x
    x = 596,606,862.29/28,120.66
  6. Step 6: Final answer
    x = 21,215.96

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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.