Home / 13,419.61-20,129.42-5,097.65

Finding the Fourth Proportional to 13,419.61, 20,129.42 and 5,097.65

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Solution

The fourth proportional to 13,419.61, 20,129.42 and 5,097.65 is: 7,646.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,419.61 : 20,129.42 = 5,097.65 : x
  2. Step 2: Convert to fraction form
    13,419.61/20,129.42 = 5,097.65/x
  3. Step 3: Cross multiply
    13,419.61x = 20,129.42 × 5,097.65
  4. Step 4: Simplify right side
    13,419.61x = 102,612,762.70
  5. Step 5: Solve for x
    x = 102,612,762.70/13,419.61
  6. Step 6: Final answer
    x = 7,646.48

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1.5x scale

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.