Home / 21,021.01-31,531.40-9,011.39

Finding the Fourth Proportional to 21,021.01, 31,531.40 and 9,011.39

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Solution

The fourth proportional to 21,021.01, 31,531.40 and 9,011.39 is: 13,517.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,021.01 : 31,531.40 = 9,011.39 : x
  2. Step 2: Convert to fraction form
    21,021.01/31,531.40 = 9,011.39/x
  3. Step 3: Cross multiply
    21,021.01x = 31,531.40 × 9,011.39
  4. Step 4: Simplify right side
    21,021.01x = 284,141,742.65
  5. Step 5: Solve for x
    x = 284,141,742.65/21,021.01
  6. Step 6: Final answer
    x = 13,517.04

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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.