Home / 13,015.71-17,974.58-12,581.55

Finding the Fourth Proportional to 13,015.71, 17,974.58 and 12,581.55

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Solution

The fourth proportional to 13,015.71, 17,974.58 and 12,581.55 is: 17,375.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,015.71 : 17,974.58 = 12,581.55 : x
  2. Step 2: Convert to fraction form
    13,015.71/17,974.58 = 12,581.55/x
  3. Step 3: Cross multiply
    13,015.71x = 17,974.58 × 12,581.55
  4. Step 4: Simplify right side
    13,015.71x = 226,148,014.09
  5. Step 5: Solve for x
    x = 226,148,014.09/13,015.71
  6. Step 6: Final answer
    x = 17,375.00

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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.