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Finding the Fourth Proportional to 21.32, 32.14 and 20.01

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Solution

The fourth proportional to 21.32, 32.14 and 20.01 is: 30.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    21.32 : 32.14 = 20.01 : x
  2. Step 2: Convert to fraction form
    21.32/32.14 = 20.01/x
  3. Step 3: Cross multiply
    21.32x = 32.14 × 20.01
  4. Step 4: Simplify right side
    21.32x = 643.02
  5. Step 5: Solve for x
    x = 643.02/21.32
  6. Step 6: Final answer
    x = 30.17

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.