Home / 13,121.62-18,112.89-9,612.70

Finding the Fourth Proportional to 13,121.62, 18,112.89 and 9,612.70

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Solution

The fourth proportional to 13,121.62, 18,112.89 and 9,612.70 is: 13,269.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,121.62 : 18,112.89 = 9,612.70 : x
  2. Step 2: Convert to fraction form
    13,121.62/18,112.89 = 9,612.70/x
  3. Step 3: Cross multiply
    13,121.62x = 18,112.89 × 9,612.70
  4. Step 4: Simplify right side
    13,121.62x = 174,113,777.70
  5. Step 5: Solve for x
    x = 174,113,777.70/13,121.62
  6. Step 6: Final answer
    x = 13,269.23

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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.