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Finding the Fourth Proportional to 30,670.27, 42,357.10 and 21,134.95

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Solution

The fourth proportional to 30,670.27, 42,357.10 and 21,134.95 is: 29,188.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,670.27 : 42,357.10 = 21,134.95 : x
  2. Step 2: Convert to fraction form
    30,670.27/42,357.10 = 21,134.95/x
  3. Step 3: Cross multiply
    30,670.27x = 42,357.10 × 21,134.95
  4. Step 4: Simplify right side
    30,670.27x = 895,215,031.91
  5. Step 5: Solve for x
    x = 895,215,031.91/30,670.27
  6. Step 6: Final answer
    x = 29,188.37

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.