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Finding the Fourth Proportional to 39,477.62, 54,479.00 and 21,572.74

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Solution

The fourth proportional to 39,477.62, 54,479.00 and 21,572.74 is: 29,770.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,477.62 : 54,479.00 = 21,572.74 : x
  2. Step 2: Convert to fraction form
    39,477.62/54,479.00 = 21,572.74/x
  3. Step 3: Cross multiply
    39,477.62x = 54,479.00 × 21,572.74
  4. Step 4: Simplify right side
    39,477.62x = 1,175,261,220.19
  5. Step 5: Solve for x
    x = 1,175,261,220.19/39,477.62
  6. Step 6: Final answer
    x = 29,770.31

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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.