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Finding the Fourth Proportional to 39.15, 54 and 24.58

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Solution

The fourth proportional to 39.15, 54 and 24.58 is: 33.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39.15 : 54 = 24.58 : x
  2. Step 2: Convert to fraction form
    39.15/54 = 24.58/x
  3. Step 3: Cross multiply
    39.15x = 54 × 24.58
  4. Step 4: Simplify right side
    39.15x = 1,327.32
  5. Step 5: Solve for x
    x = 1,327.32/39.15
  6. Step 6: Final answer
    x = 33.90

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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.