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Finding the Fourth Proportional to 45,243.90, 67,866.12 and 13,653.99

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Solution

The fourth proportional to 45,243.90, 67,866.12 and 13,653.99 is: 20,481.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,243.90 : 67,866.12 = 13,653.99 : x
  2. Step 2: Convert to fraction form
    45,243.90/67,866.12 = 13,653.99/x
  3. Step 3: Cross multiply
    45,243.90x = 67,866.12 × 13,653.99
  4. Step 4: Simplify right side
    45,243.90x = 926,643,323.82
  5. Step 5: Solve for x
    x = 926,643,323.82/45,243.90
  6. Step 6: Final answer
    x = 20,481.07

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1.5x scale

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.