Home / 21,016.80-29,002.32-13,452.48

Finding the Fourth Proportional to 21,016.80, 29,002.32 and 13,452.48

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Solution

The fourth proportional to 21,016.80, 29,002.32 and 13,452.48 is: 18,563.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,016.80 : 29,002.32 = 13,452.48 : x
  2. Step 2: Convert to fraction form
    21,016.80/29,002.32 = 13,452.48/x
  3. Step 3: Cross multiply
    21,016.80x = 29,002.32 × 13,452.48
  4. Step 4: Simplify right side
    21,016.80x = 390,153,129.75
  5. Step 5: Solve for x
    x = 390,153,129.75/21,016.80
  6. Step 6: Final answer
    x = 18,563.87

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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.