Home / 18,981.68-28,441.56-15,871.28

Finding the Fourth Proportional to 18,981.68, 28,441.56 and 15,871.28

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Solution

The fourth proportional to 18,981.68, 28,441.56 and 15,871.28 is: 23,781.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,981.68 : 28,441.56 = 15,871.28 : x
  2. Step 2: Convert to fraction form
    18,981.68/28,441.56 = 15,871.28/x
  3. Step 3: Cross multiply
    18,981.68x = 28,441.56 × 15,871.28
  4. Step 4: Simplify right side
    18,981.68x = 451,403,962.40
  5. Step 5: Solve for x
    x = 451,403,962.40/18,981.68
  6. Step 6: Final answer
    x = 23,781.03

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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.