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Finding the Fourth Proportional to 22.19, 30.57 and 21.52

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Solution

The fourth proportional to 22.19, 30.57 and 21.52 is: 29.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    22.19 : 30.57 = 21.52 : x
  2. Step 2: Convert to fraction form
    22.19/30.57 = 21.52/x
  3. Step 3: Cross multiply
    22.19x = 30.57 × 21.52
  4. Step 4: Simplify right side
    22.19x = 657.71
  5. Step 5: Solve for x
    x = 657.71/22.19
  6. Step 6: Final answer
    x = 29.64

Related Problems

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Double scale
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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.