Home / 28,119.12-38,801.88-15,543.60

Finding the Fourth Proportional to 28,119.12, 38,801.88 and 15,543.60

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Solution

The fourth proportional to 28,119.12, 38,801.88 and 15,543.60 is: 21,448.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,119.12 : 38,801.88 = 15,543.60 : x
  2. Step 2: Convert to fraction form
    28,119.12/38,801.88 = 15,543.60/x
  3. Step 3: Cross multiply
    28,119.12x = 38,801.88 × 15,543.60
  4. Step 4: Simplify right side
    28,119.12x = 603,120,901.97
  5. Step 5: Solve for x
    x = 603,120,901.97/28,119.12
  6. Step 6: Final answer
    x = 21,448.78

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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.