Home / 13,621.14-20,332.31-11,685.78

Finding the Fourth Proportional to 13,621.14, 20,332.31 and 11,685.78

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Solution

The fourth proportional to 13,621.14, 20,332.31 and 11,685.78 is: 17,443.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,621.14 : 20,332.31 = 11,685.78 : x
  2. Step 2: Convert to fraction form
    13,621.14/20,332.31 = 11,685.78/x
  3. Step 3: Cross multiply
    13,621.14x = 20,332.31 × 11,685.78
  4. Step 4: Simplify right side
    13,621.14x = 237,598,843.12
  5. Step 5: Solve for x
    x = 237,598,843.12/13,621.14
  6. Step 6: Final answer
    x = 17,443.39

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.