Home / 18,871.20-28,416.48-13,975.52

Finding the Fourth Proportional to 18,871.20, 28,416.48 and 13,975.52

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Solution

The fourth proportional to 18,871.20, 28,416.48 and 13,975.52 is: 21,044.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,871.20 : 28,416.48 = 13,975.52 : x
  2. Step 2: Convert to fraction form
    18,871.20/28,416.48 = 13,975.52/x
  3. Step 3: Cross multiply
    18,871.20x = 28,416.48 × 13,975.52
  4. Step 4: Simplify right side
    18,871.20x = 397,135,084.57
  5. Step 5: Solve for x
    x = 397,135,084.57/18,871.20
  6. Step 6: Final answer
    x = 21,044.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.