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Finding the Fourth Proportional to 21,970.52, 30,319.30 and 11,898.96

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Solution

The fourth proportional to 21,970.52, 30,319.30 and 11,898.96 is: 16,420.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,970.52 : 30,319.30 = 11,898.96 : x
  2. Step 2: Convert to fraction form
    21,970.52/30,319.30 = 11,898.96/x
  3. Step 3: Cross multiply
    21,970.52x = 30,319.30 × 11,898.96
  4. Step 4: Simplify right side
    21,970.52x = 360,768,081.34
  5. Step 5: Solve for x
    x = 360,768,081.34/21,970.52
  6. Step 6: Final answer
    x = 16,420.56

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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.