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Finding the Fourth Proportional to 12,681.95, 17,505.15 and 8,906.03

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Solution

The fourth proportional to 12,681.95, 17,505.15 and 8,906.03 is: 12,293.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,681.95 : 17,505.15 = 8,906.03 : x
  2. Step 2: Convert to fraction form
    12,681.95/17,505.15 = 8,906.03/x
  3. Step 3: Cross multiply
    12,681.95x = 17,505.15 × 8,906.03
  4. Step 4: Simplify right side
    12,681.95x = 155,901,391.05
  5. Step 5: Solve for x
    x = 155,901,391.05/12,681.95
  6. Step 6: Final answer
    x = 12,293.17

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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.