Home / 8,129.79-11,217.59-5,143.53

Finding the Fourth Proportional to 8,129.79, 11,217.59 and 5,143.53

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Solution

The fourth proportional to 8,129.79, 11,217.59 and 5,143.53 is: 7,097.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,129.79 : 11,217.59 = 5,143.53 : x
  2. Step 2: Convert to fraction form
    8,129.79/11,217.59 = 5,143.53/x
  3. Step 3: Cross multiply
    8,129.79x = 11,217.59 × 5,143.53
  4. Step 4: Simplify right side
    8,129.79x = 57,698,010.69
  5. Step 5: Solve for x
    x = 57,698,010.69/8,129.79
  6. Step 6: Final answer
    x = 7,097.11

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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.