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Finding the Fourth Proportional to 12,930.66, 17,851.13 and 8,703.95

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Solution

The fourth proportional to 12,930.66, 17,851.13 and 8,703.95 is: 12,016.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,930.66 : 17,851.13 = 8,703.95 : x
  2. Step 2: Convert to fraction form
    12,930.66/17,851.13 = 8,703.95/x
  3. Step 3: Cross multiply
    12,930.66x = 17,851.13 × 8,703.95
  4. Step 4: Simplify right side
    12,930.66x = 155,375,210.19
  5. Step 5: Solve for x
    x = 155,375,210.19/12,930.66
  6. Step 6: Final answer
    x = 12,016.03

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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.