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Finding the Fourth Proportional to 59.34, 89.00 and 18.74

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Solution

The fourth proportional to 59.34, 89.00 and 18.74 is: 28.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.34 : 89.00 = 18.74 : x
  2. Step 2: Convert to fraction form
    59.34/89.00 = 18.74/x
  3. Step 3: Cross multiply
    59.34x = 89.00 × 18.74
  4. Step 4: Simplify right side
    59.34x = 1,667.32
  5. Step 5: Solve for x
    x = 1,667.32/59.34
  6. Step 6: Final answer
    x = 28.10

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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.