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Finding the Fourth Proportional to 19.30, 26.61 and 18.19

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Solution

The fourth proportional to 19.30, 26.61 and 18.19 is: 25.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    19.30 : 26.61 = 18.19 : x
  2. Step 2: Convert to fraction form
    19.30/26.61 = 18.19/x
  3. Step 3: Cross multiply
    19.30x = 26.61 × 18.19
  4. Step 4: Simplify right side
    19.30x = 483.97
  5. Step 5: Solve for x
    x = 483.97/19.30
  6. Step 6: Final answer
    x = 25.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.