Home / 21,271.68-31,918.28-8,800.65

Finding the Fourth Proportional to 21,271.68, 31,918.28 and 8,800.65

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Solution

The fourth proportional to 21,271.68, 31,918.28 and 8,800.65 is: 13,205.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.68 : 31,918.28 = 8,800.65 : x
  2. Step 2: Convert to fraction form
    21,271.68/31,918.28 = 8,800.65/x
  3. Step 3: Cross multiply
    21,271.68x = 31,918.28 × 8,800.65
  4. Step 4: Simplify right side
    21,271.68x = 280,901,734.39
  5. Step 5: Solve for x
    x = 280,901,734.39/21,271.68
  6. Step 6: Final answer
    x = 13,205.43

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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.