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Finding the Fourth Proportional to 23.36, 32.16 and 21.32

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Solution

The fourth proportional to 23.36, 32.16 and 21.32 is: 29.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    23.36 : 32.16 = 21.32 : x
  2. Step 2: Convert to fraction form
    23.36/32.16 = 21.32/x
  3. Step 3: Cross multiply
    23.36x = 32.16 × 21.32
  4. Step 4: Simplify right side
    23.36x = 685.49
  5. Step 5: Solve for x
    x = 685.49/23.36
  6. Step 6: Final answer
    x = 29.35

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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.