Home / 25.10-37.80-21.28

Finding the Fourth Proportional to 25.10, 37.80 and 21.28

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Solution

The fourth proportional to 25.10, 37.80 and 21.28 is: 32.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    25.10 : 37.80 = 21.28 : x
  2. Step 2: Convert to fraction form
    25.10/37.80 = 21.28/x
  3. Step 3: Cross multiply
    25.10x = 37.80 × 21.28
  4. Step 4: Simplify right side
    25.10x = 804.38
  5. Step 5: Solve for x
    x = 804.38/25.10
  6. Step 6: Final answer
    x = 32.05

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.