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Finding the Fourth Proportional to 25.93, 35.78 and 15.57

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Solution

The fourth proportional to 25.93, 35.78 and 15.57 is: 21.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.93 : 35.78 = 15.57 : x
  2. Step 2: Convert to fraction form
    25.93/35.78 = 15.57/x
  3. Step 3: Cross multiply
    25.93x = 35.78 × 15.57
  4. Step 4: Simplify right side
    25.93x = 557.02
  5. Step 5: Solve for x
    x = 557.02/25.93
  6. Step 6: Final answer
    x = 21.48

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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.