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Finding the Fourth Proportional to 14.67, 21.86 and 14.40

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Solution

The fourth proportional to 14.67, 21.86 and 14.40 is: 21.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14.67 : 21.86 = 14.40 : x
  2. Step 2: Convert to fraction form
    14.67/21.86 = 14.40/x
  3. Step 3: Cross multiply
    14.67x = 21.86 × 14.40
  4. Step 4: Simplify right side
    14.67x = 314.71
  5. Step 5: Solve for x
    x = 314.71/14.67
  6. Step 6: Final answer
    x = 21.45

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.