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Finding the Fourth Proportional to 15.49, 21.23 and 14.58

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Solution

The fourth proportional to 15.49, 21.23 and 14.58 is: 19.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15.49 : 21.23 = 14.58 : x
  2. Step 2: Convert to fraction form
    15.49/21.23 = 14.58/x
  3. Step 3: Cross multiply
    15.49x = 21.23 × 14.58
  4. Step 4: Simplify right side
    15.49x = 309.52
  5. Step 5: Solve for x
    x = 309.52/15.49
  6. Step 6: Final answer
    x = 19.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.