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Finding the Fourth Proportional to 39,481.84, 54,482.64 and 21,577

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Solution

The fourth proportional to 39,481.84, 54,482.64 and 21,577 is: 29,775.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,481.84 : 54,482.64 = 21,577 : x
  2. Step 2: Convert to fraction form
    39,481.84/54,482.64 = 21,577/x
  3. Step 3: Cross multiply
    39,481.84x = 54,482.64 × 21,577
  4. Step 4: Simplify right side
    39,481.84x = 1,175,571,923.28
  5. Step 5: Solve for x
    x = 1,175,571,923.28/39,481.84
  6. Step 6: Final answer
    x = 29,775.00

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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.