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Finding the Fourth Proportional to 38,641.80, 53,327 and 21,645.84

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Solution

The fourth proportional to 38,641.80, 53,327 and 21,645.84 is: 29,872.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,641.80 : 53,327 = 21,645.84 : x
  2. Step 2: Convert to fraction form
    38,641.80/53,327 = 21,645.84/x
  3. Step 3: Cross multiply
    38,641.80x = 53,327 × 21,645.84
  4. Step 4: Simplify right side
    38,641.80x = 1,154,307,709.68
  5. Step 5: Solve for x
    x = 1,154,307,709.68/38,641.80
  6. Step 6: Final answer
    x = 29,872.00

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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.