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Finding the Fourth Proportional to 39,482.32, 54,486.32 and 21,578.08

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Solution

The fourth proportional to 39,482.32, 54,486.32 and 21,578.08 is: 29,778.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,482.32 : 54,486.32 = 21,578.08 : x
  2. Step 2: Convert to fraction form
    39,482.32/54,486.32 = 21,578.08/x
  3. Step 3: Cross multiply
    39,482.32x = 54,486.32 × 21,578.08
  4. Step 4: Simplify right side
    39,482.32x = 1,175,709,791.54
  5. Step 5: Solve for x
    x = 1,175,709,791.54/39,482.32
  6. Step 6: Final answer
    x = 29,778.14

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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.