Home / 13,611.29-18,785.57-7,947.72

Finding the Fourth Proportional to 13,611.29, 18,785.57 and 7,947.72

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Solution

The fourth proportional to 13,611.29, 18,785.57 and 7,947.72 is: 10,969.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,611.29 : 18,785.57 = 7,947.72 : x
  2. Step 2: Convert to fraction form
    13,611.29/18,785.57 = 7,947.72/x
  3. Step 3: Cross multiply
    13,611.29x = 18,785.57 × 7,947.72
  4. Step 4: Simplify right side
    13,611.29x = 149,302,410.66
  5. Step 5: Solve for x
    x = 149,302,410.66/13,611.29
  6. Step 6: Final answer
    x = 10,969.02

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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.