Home / 13,179.57-18,187.32-7,871.23

Finding the Fourth Proportional to 13,179.57, 18,187.32 and 7,871.23

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Solution

The fourth proportional to 13,179.57, 18,187.32 and 7,871.23 is: 10,862.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,179.57 : 18,187.32 = 7,871.23 : x
  2. Step 2: Convert to fraction form
    13,179.57/18,187.32 = 7,871.23/x
  3. Step 3: Cross multiply
    13,179.57x = 18,187.32 × 7,871.23
  4. Step 4: Simplify right side
    13,179.57x = 143,156,578.80
  5. Step 5: Solve for x
    x = 143,156,578.80/13,179.57
  6. Step 6: Final answer
    x = 10,862.01

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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.