Home / 21,146.92-29,169.55-13,603.08

Finding the Fourth Proportional to 21,146.92, 29,169.55 and 13,603.08

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Solution

The fourth proportional to 21,146.92, 29,169.55 and 13,603.08 is: 18,763.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,146.92 : 29,169.55 = 13,603.08 : x
  2. Step 2: Convert to fraction form
    21,146.92/29,169.55 = 13,603.08/x
  3. Step 3: Cross multiply
    21,146.92x = 29,169.55 × 13,603.08
  4. Step 4: Simplify right side
    21,146.92x = 396,795,722.21
  5. Step 5: Solve for x
    x = 396,795,722.21/21,146.92
  6. Step 6: Final answer
    x = 18,763.76

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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.