Home / 21,088.54-31,644.09-13,691.26

Finding the Fourth Proportional to 21,088.54, 31,644.09 and 13,691.26

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Solution

The fourth proportional to 21,088.54, 31,644.09 and 13,691.26 is: 20,544.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,088.54 : 31,644.09 = 13,691.26 : x
  2. Step 2: Convert to fraction form
    21,088.54/31,644.09 = 13,691.26/x
  3. Step 3: Cross multiply
    21,088.54x = 31,644.09 × 13,691.26
  4. Step 4: Simplify right side
    21,088.54x = 433,247,463.65
  5. Step 5: Solve for x
    x = 433,247,463.65/21,088.54
  6. Step 6: Final answer
    x = 20,544.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.