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Finding the Fourth Proportional to 14,359.50, 19,815.75 and 7,986.11

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Solution

The fourth proportional to 14,359.50, 19,815.75 and 7,986.11 is: 11,020.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,359.50 : 19,815.75 = 7,986.11 : x
  2. Step 2: Convert to fraction form
    14,359.50/19,815.75 = 7,986.11/x
  3. Step 3: Cross multiply
    14,359.50x = 19,815.75 × 7,986.11
  4. Step 4: Simplify right side
    14,359.50x = 158,250,660.15
  5. Step 5: Solve for x
    x = 158,250,660.15/14,359.50
  6. Step 6: Final answer
    x = 11,020.62

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1.5x scale

Why These Related Problems?

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