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Finding the Fourth Proportional to 39,482.59, 54,486.74 and 21,578.69

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Solution

The fourth proportional to 39,482.59, 54,486.74 and 21,578.69 is: 29,779.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,482.59 : 54,486.74 = 21,578.69 : x
  2. Step 2: Convert to fraction form
    39,482.59/54,486.74 = 21,578.69/x
  3. Step 3: Cross multiply
    39,482.59x = 54,486.74 × 21,578.69
  4. Step 4: Simplify right side
    39,482.59x = 1,175,752,471.57
  5. Step 5: Solve for x
    x = 1,175,752,471.57/39,482.59
  6. Step 6: Final answer
    x = 29,779.01

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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.