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Finding the Fourth Proportional to 12,812.00, 17,680.07 and 7,146.65

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Solution

The fourth proportional to 12,812.00, 17,680.07 and 7,146.65 is: 9,862.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,812.00 : 17,680.07 = 7,146.65 : x
  2. Step 2: Convert to fraction form
    12,812.00/17,680.07 = 7,146.65/x
  3. Step 3: Cross multiply
    12,812.00x = 17,680.07 × 7,146.65
  4. Step 4: Simplify right side
    12,812.00x = 126,353,334.33
  5. Step 5: Solve for x
    x = 126,353,334.33/12,812.00
  6. Step 6: Final answer
    x = 9,862.11

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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.