Home / 25.14-37.80-21.48

Finding the Fourth Proportional to 25.14, 37.80 and 21.48

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Solution

The fourth proportional to 25.14, 37.80 and 21.48 is: 32.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.14 : 37.80 = 21.48 : x
  2. Step 2: Convert to fraction form
    25.14/37.80 = 21.48/x
  3. Step 3: Cross multiply
    25.14x = 37.80 × 21.48
  4. Step 4: Simplify right side
    25.14x = 811.94
  5. Step 5: Solve for x
    x = 811.94/25.14
  6. Step 6: Final answer
    x = 32.30

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.