Home / 13,147.12-19,720.80-4,382

Finding the Fourth Proportional to 13,147.12, 19,720.80 and 4,382

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Solution

The fourth proportional to 13,147.12, 19,720.80 and 4,382 is: 6,573.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.12 : 19,720.80 = 4,382 : x
  2. Step 2: Convert to fraction form
    13,147.12/19,720.80 = 4,382/x
  3. Step 3: Cross multiply
    13,147.12x = 19,720.80 × 4,382
  4. Step 4: Simplify right side
    13,147.12x = 86,416,545.60
  5. Step 5: Solve for x
    x = 86,416,545.60/13,147.12
  6. Step 6: Final answer
    x = 6,573.04

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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.