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Finding the Fourth Proportional to 15,412.98, 21,269.88 and 8,339.40

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Solution

The fourth proportional to 15,412.98, 21,269.88 and 8,339.40 is: 11,508.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,412.98 : 21,269.88 = 8,339.40 : x
  2. Step 2: Convert to fraction form
    15,412.98/21,269.88 = 8,339.40/x
  3. Step 3: Cross multiply
    15,412.98x = 21,269.88 × 8,339.40
  4. Step 4: Simplify right side
    15,412.98x = 177,378,037.27
  5. Step 5: Solve for x
    x = 177,378,037.27/15,412.98
  6. Step 6: Final answer
    x = 11,508.35

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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.