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Finding the Fourth Proportional to 25.40, 35 and 23.78

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Solution

The fourth proportional to 25.40, 35 and 23.78 is: 32.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.40 : 35 = 23.78 : x
  2. Step 2: Convert to fraction form
    25.40/35 = 23.78/x
  3. Step 3: Cross multiply
    25.40x = 35 × 23.78
  4. Step 4: Simplify right side
    25.40x = 832.30
  5. Step 5: Solve for x
    x = 832.30/25.40
  6. Step 6: Final answer
    x = 32.77

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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.