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Finding the Fourth Proportional to 21,872.61, 32,809.32 and 6,290.64

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Solution

The fourth proportional to 21,872.61, 32,809.32 and 6,290.64 is: 9,436.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,872.61 : 32,809.32 = 6,290.64 : x
  2. Step 2: Convert to fraction form
    21,872.61/32,809.32 = 6,290.64/x
  3. Step 3: Cross multiply
    21,872.61x = 32,809.32 × 6,290.64
  4. Step 4: Simplify right side
    21,872.61x = 206,391,620.76
  5. Step 5: Solve for x
    x = 206,391,620.76/21,872.61
  6. Step 6: Final answer
    x = 9,436.08

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1.5x scale

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.