Home / 28,666.80-43,001.28-7,891.92

Finding the Fourth Proportional to 28,666.80, 43,001.28 and 7,891.92

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Solution

The fourth proportional to 28,666.80, 43,001.28 and 7,891.92 is: 11,838.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,666.80 : 43,001.28 = 7,891.92 : x
  2. Step 2: Convert to fraction form
    28,666.80/43,001.28 = 7,891.92/x
  3. Step 3: Cross multiply
    28,666.80x = 43,001.28 × 7,891.92
  4. Step 4: Simplify right side
    28,666.80x = 339,362,661.66
  5. Step 5: Solve for x
    x = 339,362,661.66/28,666.80
  6. Step 6: Final answer
    x = 11,838.18

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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.