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Finding the Fourth Proportional to 59.71, 89.53 and 21.19

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Solution

The fourth proportional to 59.71, 89.53 and 21.19 is: 31.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.71 : 89.53 = 21.19 : x
  2. Step 2: Convert to fraction form
    59.71/89.53 = 21.19/x
  3. Step 3: Cross multiply
    59.71x = 89.53 × 21.19
  4. Step 4: Simplify right side
    59.71x = 1,897.28
  5. Step 5: Solve for x
    x = 1,897.28/59.71
  6. Step 6: Final answer
    x = 31.77

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.