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Finding the Fourth Proportional to 12,912.71, 17,818.07 and 7,246.28

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Solution

The fourth proportional to 12,912.71, 17,818.07 and 7,246.28 is: 9,999.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,912.71 : 17,818.07 = 7,246.28 : x
  2. Step 2: Convert to fraction form
    12,912.71/17,818.07 = 7,246.28/x
  3. Step 3: Cross multiply
    12,912.71x = 17,818.07 × 7,246.28
  4. Step 4: Simplify right side
    12,912.71x = 129,114,732.59
  5. Step 5: Solve for x
    x = 129,114,732.59/12,912.71
  6. Step 6: Final answer
    x = 9,999.05

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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.