Home / 21,218.67-29,269.58-13,247.06

Finding the Fourth Proportional to 21,218.67, 29,269.58 and 13,247.06

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Solution

The fourth proportional to 21,218.67, 29,269.58 and 13,247.06 is: 18,273.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,218.67 : 29,269.58 = 13,247.06 : x
  2. Step 2: Convert to fraction form
    21,218.67/29,269.58 = 13,247.06/x
  3. Step 3: Cross multiply
    21,218.67x = 29,269.58 × 13,247.06
  4. Step 4: Simplify right side
    21,218.67x = 387,735,842.38
  5. Step 5: Solve for x
    x = 387,735,842.38/21,218.67
  6. Step 6: Final answer
    x = 18,273.33

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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.