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Finding the Fourth Proportional to 12,591.78, 17,368.99 and 9,059.77

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Solution

The fourth proportional to 12,591.78, 17,368.99 and 9,059.77 is: 12,496.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,591.78 : 17,368.99 = 9,059.77 : x
  2. Step 2: Convert to fraction form
    12,591.78/17,368.99 = 9,059.77/x
  3. Step 3: Cross multiply
    12,591.78x = 17,368.99 × 9,059.77
  4. Step 4: Simplify right side
    12,591.78x = 157,359,054.53
  5. Step 5: Solve for x
    x = 157,359,054.53/12,591.78
  6. Step 6: Final answer
    x = 12,496.97

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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.