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Finding the Fourth Proportional to 58.29, 87.42 and 19.77

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Solution

The fourth proportional to 58.29, 87.42 and 19.77 is: 29.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    58.29 : 87.42 = 19.77 : x
  2. Step 2: Convert to fraction form
    58.29/87.42 = 19.77/x
  3. Step 3: Cross multiply
    58.29x = 87.42 × 19.77
  4. Step 4: Simplify right side
    58.29x = 1,728.29
  5. Step 5: Solve for x
    x = 1,728.29/58.29
  6. Step 6: Final answer
    x = 29.65

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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.