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Finding the Fourth Proportional to 39,479.68, 54,482.10 and 21,574.68

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Solution

The fourth proportional to 39,479.68, 54,482.10 and 21,574.68 is: 29,773.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,479.68 : 54,482.10 = 21,574.68 : x
  2. Step 2: Convert to fraction form
    39,479.68/54,482.10 = 21,574.68/x
  3. Step 3: Cross multiply
    39,479.68x = 54,482.10 × 21,574.68
  4. Step 4: Simplify right side
    39,479.68x = 1,175,433,873.23
  5. Step 5: Solve for x
    x = 1,175,433,873.23/39,479.68
  6. Step 6: Final answer
    x = 29,773.14

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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.