Home / 28,380.12-39,164.14-16,443.18

Finding the Fourth Proportional to 28,380.12, 39,164.14 and 16,443.18

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Solution

The fourth proportional to 28,380.12, 39,164.14 and 16,443.18 is: 22,691.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,380.12 : 39,164.14 = 16,443.18 : x
  2. Step 2: Convert to fraction form
    28,380.12/39,164.14 = 16,443.18/x
  3. Step 3: Cross multiply
    28,380.12x = 39,164.14 × 16,443.18
  4. Step 4: Simplify right side
    28,380.12x = 643,983,003.57
  5. Step 5: Solve for x
    x = 643,983,003.57/28,380.12
  6. Step 6: Final answer
    x = 22,691.34

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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.