Home / 12,841.81-17,720.19-7,176.56

Finding the Fourth Proportional to 12,841.81, 17,720.19 and 7,176.56

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Solution

The fourth proportional to 12,841.81, 17,720.19 and 7,176.56 is: 9,902.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,841.81 : 17,720.19 = 7,176.56 : x
  2. Step 2: Convert to fraction form
    12,841.81/17,720.19 = 7,176.56/x
  3. Step 3: Cross multiply
    12,841.81x = 17,720.19 × 7,176.56
  4. Step 4: Simplify right side
    12,841.81x = 127,169,918.15
  5. Step 5: Solve for x
    x = 127,169,918.15/12,841.81
  6. Step 6: Final answer
    x = 9,902.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.