Home / 21,178.75-29,226.69-11,747.32

Finding the Fourth Proportional to 21,178.75, 29,226.69 and 11,747.32

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Solution

The fourth proportional to 21,178.75, 29,226.69 and 11,747.32 is: 16,211.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.75 : 29,226.69 = 11,747.32 : x
  2. Step 2: Convert to fraction form
    21,178.75/29,226.69 = 11,747.32/x
  3. Step 3: Cross multiply
    21,178.75x = 29,226.69 × 11,747.32
  4. Step 4: Simplify right side
    21,178.75x = 343,335,279.97
  5. Step 5: Solve for x
    x = 343,335,279.97/21,178.75
  6. Step 6: Final answer
    x = 16,211.31

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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.