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Finding the Fourth Proportional to 19, 26.33 and 18.70

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Solution

The fourth proportional to 19, 26.33 and 18.70 is: 25.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    19 : 26.33 = 18.70 : x
  2. Step 2: Convert to fraction form
    19/26.33 = 18.70/x
  3. Step 3: Cross multiply
    19x = 26.33 × 18.70
  4. Step 4: Simplify right side
    19x = 492.37
  5. Step 5: Solve for x
    x = 492.37/19
  6. Step 6: Final answer
    x = 25.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.