Home / 13,121.04-18,114.57-8,643.15

Finding the Fourth Proportional to 13,121.04, 18,114.57 and 8,643.15

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Solution

The fourth proportional to 13,121.04, 18,114.57 and 8,643.15 is: 11,932.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.04 : 18,114.57 = 8,643.15 : x
  2. Step 2: Convert to fraction form
    13,121.04/18,114.57 = 8,643.15/x
  3. Step 3: Cross multiply
    13,121.04x = 18,114.57 × 8,643.15
  4. Step 4: Simplify right side
    13,121.04x = 156,566,945.70
  5. Step 5: Solve for x
    x = 156,566,945.70/13,121.04
  6. Step 6: Final answer
    x = 11,932.51

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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.