Home / 28,687.15-43,031.13-10,918.05

Finding the Fourth Proportional to 28,687.15, 43,031.13 and 10,918.05

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Solution

The fourth proportional to 28,687.15, 43,031.13 and 10,918.05 is: 16,377.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,687.15 : 43,031.13 = 10,918.05 : x
  2. Step 2: Convert to fraction form
    28,687.15/43,031.13 = 10,918.05/x
  3. Step 3: Cross multiply
    28,687.15x = 43,031.13 × 10,918.05
  4. Step 4: Simplify right side
    28,687.15x = 469,816,028.90
  5. Step 5: Solve for x
    x = 469,816,028.90/28,687.15
  6. Step 6: Final answer
    x = 16,377.23

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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.