Home / 13,145.87-18,160.49-11,374.40

Finding the Fourth Proportional to 13,145.87, 18,160.49 and 11,374.40

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Solution

The fourth proportional to 13,145.87, 18,160.49 and 11,374.40 is: 15,713.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,145.87 : 18,160.49 = 11,374.40 : x
  2. Step 2: Convert to fraction form
    13,145.87/18,160.49 = 11,374.40/x
  3. Step 3: Cross multiply
    13,145.87x = 18,160.49 × 11,374.40
  4. Step 4: Simplify right side
    13,145.87x = 206,564,684.22
  5. Step 5: Solve for x
    x = 206,564,684.22/13,145.87
  6. Step 6: Final answer
    x = 15,713.28

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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.