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Finding the Fourth Proportional to 39,393.60, 54,361.17 and 21,488.46

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Solution

The fourth proportional to 39,393.60, 54,361.17 and 21,488.46 is: 29,652.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,393.60 : 54,361.17 = 21,488.46 : x
  2. Step 2: Convert to fraction form
    39,393.60/54,361.17 = 21,488.46/x
  3. Step 3: Cross multiply
    39,393.60x = 54,361.17 × 21,488.46
  4. Step 4: Simplify right side
    39,393.60x = 1,168,137,827.10
  5. Step 5: Solve for x
    x = 1,168,137,827.10/39,393.60
  6. Step 6: Final answer
    x = 29,652.98

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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.