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Finding the Fourth Proportional to 45,393.48, 68,032.71 and 20,406.87

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Solution

The fourth proportional to 45,393.48, 68,032.71 and 20,406.87 is: 30,584.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,393.48 : 68,032.71 = 20,406.87 : x
  2. Step 2: Convert to fraction form
    45,393.48/68,032.71 = 20,406.87/x
  3. Step 3: Cross multiply
    45,393.48x = 68,032.71 × 20,406.87
  4. Step 4: Simplify right side
    45,393.48x = 1,388,334,668.72
  5. Step 5: Solve for x
    x = 1,388,334,668.72/45,393.48
  6. Step 6: Final answer
    x = 30,584.45

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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.