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Finding the Fourth Proportional to 15.51, 23.28 and 12.99

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Solution

The fourth proportional to 15.51, 23.28 and 12.99 is: 19.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.51 : 23.28 = 12.99 : x
  2. Step 2: Convert to fraction form
    15.51/23.28 = 12.99/x
  3. Step 3: Cross multiply
    15.51x = 23.28 × 12.99
  4. Step 4: Simplify right side
    15.51x = 302.41
  5. Step 5: Solve for x
    x = 302.41/15.51
  6. Step 6: Final answer
    x = 19.50

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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.