Home / 10,988.20-16,487.72-5,143.80

Finding the Fourth Proportional to 10,988.20, 16,487.72 and 5,143.80

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Solution

The fourth proportional to 10,988.20, 16,487.72 and 5,143.80 is: 7,718.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,988.20 : 16,487.72 = 5,143.80 : x
  2. Step 2: Convert to fraction form
    10,988.20/16,487.72 = 5,143.80/x
  3. Step 3: Cross multiply
    10,988.20x = 16,487.72 × 5,143.80
  4. Step 4: Simplify right side
    10,988.20x = 84,809,534.14
  5. Step 5: Solve for x
    x = 84,809,534.14/10,988.20
  6. Step 6: Final answer
    x = 7,718.24

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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.