Home / 18,139.45-27,205.98-4,988.65

Finding the Fourth Proportional to 18,139.45, 27,205.98 and 4,988.65

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Solution

The fourth proportional to 18,139.45, 27,205.98 and 4,988.65 is: 7,482.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,139.45 : 27,205.98 = 4,988.65 : x
  2. Step 2: Convert to fraction form
    18,139.45/27,205.98 = 4,988.65/x
  3. Step 3: Cross multiply
    18,139.45x = 27,205.98 × 4,988.65
  4. Step 4: Simplify right side
    18,139.45x = 135,721,112.13
  5. Step 5: Solve for x
    x = 135,721,112.13/18,139.45
  6. Step 6: Final answer
    x = 7,482.10

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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.