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Finding the Fourth Proportional to 19, 28.46 and 18.36

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Solution

The fourth proportional to 19, 28.46 and 18.36 is: 27.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    19 : 28.46 = 18.36 : x
  2. Step 2: Convert to fraction form
    19/28.46 = 18.36/x
  3. Step 3: Cross multiply
    19x = 28.46 × 18.36
  4. Step 4: Simplify right side
    19x = 522.53
  5. Step 5: Solve for x
    x = 522.53/19
  6. Step 6: Final answer
    x = 27.50

Related Problems

Find fourth proportional to 9.50, 14.23 and 9.18
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Double scale
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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.