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Finding the Fourth Proportional to 25, 37.51 and 11.47

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Solution

The fourth proportional to 25, 37.51 and 11.47 is: 17.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    25 : 37.51 = 11.47 : x
  2. Step 2: Convert to fraction form
    25/37.51 = 11.47/x
  3. Step 3: Cross multiply
    25x = 37.51 × 11.47
  4. Step 4: Simplify right side
    25x = 430.24
  5. Step 5: Solve for x
    x = 430.24/25
  6. Step 6: Final answer
    x = 17.21

Related Problems

Find fourth proportional to 12.50, 18.76 and 5.74
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Double scale
Find fourth proportional to 26, 39.01 and 12.47
Similar ratio
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1.5x scale

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.