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Finding the Fourth Proportional to 12,465.59, 17,165.79 and 11,138.81

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Solution

The fourth proportional to 12,465.59, 17,165.79 and 11,138.81 is: 15,338.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,465.59 : 17,165.79 = 11,138.81 : x
  2. Step 2: Convert to fraction form
    12,465.59/17,165.79 = 11,138.81/x
  3. Step 3: Cross multiply
    12,465.59x = 17,165.79 × 11,138.81
  4. Step 4: Simplify right side
    12,465.59x = 191,206,387.48
  5. Step 5: Solve for x
    x = 191,206,387.48/12,465.59
  6. Step 6: Final answer
    x = 15,338.74

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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.