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Finding the Fourth Proportional to 45,587.80, 68,349.30 and 20,639.80

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Solution

The fourth proportional to 45,587.80, 68,349.30 and 20,639.80 is: 30,945.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,587.80 : 68,349.30 = 20,639.80 : x
  2. Step 2: Convert to fraction form
    45,587.80/68,349.30 = 20,639.80/x
  3. Step 3: Cross multiply
    45,587.80x = 68,349.30 × 20,639.80
  4. Step 4: Simplify right side
    45,587.80x = 1,410,715,882.14
  5. Step 5: Solve for x
    x = 1,410,715,882.14/45,587.80
  6. Step 6: Final answer
    x = 30,945.03

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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.