Home / 12,812.52-17,681.36-7,147.62

Finding the Fourth Proportional to 12,812.52, 17,681.36 and 7,147.62

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Solution

The fourth proportional to 12,812.52, 17,681.36 and 7,147.62 is: 9,863.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,812.52 : 17,681.36 = 7,147.62 : x
  2. Step 2: Convert to fraction form
    12,812.52/17,681.36 = 7,147.62/x
  3. Step 3: Cross multiply
    12,812.52x = 17,681.36 × 7,147.62
  4. Step 4: Simplify right side
    12,812.52x = 126,379,642.36
  5. Step 5: Solve for x
    x = 126,379,642.36/12,812.52
  6. Step 6: Final answer
    x = 9,863.76

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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.