Home / 15,543.21-23,321.69-8,145.90

Finding the Fourth Proportional to 15,543.21, 23,321.69 and 8,145.90

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Solution

The fourth proportional to 15,543.21, 23,321.69 and 8,145.90 is: 12,222.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,543.21 : 23,321.69 = 8,145.90 : x
  2. Step 2: Convert to fraction form
    15,543.21/23,321.69 = 8,145.90/x
  3. Step 3: Cross multiply
    15,543.21x = 23,321.69 × 8,145.90
  4. Step 4: Simplify right side
    15,543.21x = 189,976,154.57
  5. Step 5: Solve for x
    x = 189,976,154.57/15,543.21
  6. Step 6: Final answer
    x = 12,222.45

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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.