Home / 28,480.40-42,725.04-13,686.56

Finding the Fourth Proportional to 28,480.40, 42,725.04 and 13,686.56

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Solution

The fourth proportional to 28,480.40, 42,725.04 and 13,686.56 is: 20,531.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,480.40 : 42,725.04 = 13,686.56 : x
  2. Step 2: Convert to fraction form
    28,480.40/42,725.04 = 13,686.56/x
  3. Step 3: Cross multiply
    28,480.40x = 42,725.04 × 13,686.56
  4. Step 4: Simplify right side
    28,480.40x = 584,758,823.46
  5. Step 5: Solve for x
    x = 584,758,823.46/28,480.40
  6. Step 6: Final answer
    x = 20,531.97

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.