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Finding the Fourth Proportional to 39,478.94, 54,481.08 and 21,574.22

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Solution

The fourth proportional to 39,478.94, 54,481.08 and 21,574.22 is: 29,772.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,478.94 : 54,481.08 = 21,574.22 : x
  2. Step 2: Convert to fraction form
    39,478.94/54,481.08 = 21,574.22/x
  3. Step 3: Cross multiply
    39,478.94x = 54,481.08 × 21,574.22
  4. Step 4: Simplify right side
    39,478.94x = 1,175,386,805.76
  5. Step 5: Solve for x
    x = 1,175,386,805.76/39,478.94
  6. Step 6: Final answer
    x = 29,772.50

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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.