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Finding the Fourth Proportional to 16.40, 22.62 and 12.76

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Solution

The fourth proportional to 16.40, 22.62 and 12.76 is: 17.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    16.40 : 22.62 = 12.76 : x
  2. Step 2: Convert to fraction form
    16.40/22.62 = 12.76/x
  3. Step 3: Cross multiply
    16.40x = 22.62 × 12.76
  4. Step 4: Simplify right side
    16.40x = 288.63
  5. Step 5: Solve for x
    x = 288.63/16.40
  6. Step 6: Final answer
    x = 17.60

Related Problems

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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.