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Finding the Fourth Proportional to 19, 26.16 and 18.16

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Solution

The fourth proportional to 19, 26.16 and 18.16 is: 25.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    19 : 26.16 = 18.16 : x
  2. Step 2: Convert to fraction form
    19/26.16 = 18.16/x
  3. Step 3: Cross multiply
    19x = 26.16 × 18.16
  4. Step 4: Simplify right side
    19x = 475.07
  5. Step 5: Solve for x
    x = 475.07/19
  6. Step 6: Final answer
    x = 25.00

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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.