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Finding the Fourth Proportional to 20,380.78, 30,572.47 and 7,055.06

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Solution

The fourth proportional to 20,380.78, 30,572.47 and 7,055.06 is: 10,583.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,380.78 : 30,572.47 = 7,055.06 : x
  2. Step 2: Convert to fraction form
    20,380.78/30,572.47 = 7,055.06/x
  3. Step 3: Cross multiply
    20,380.78x = 30,572.47 × 7,055.06
  4. Step 4: Simplify right side
    20,380.78x = 215,690,466.15
  5. Step 5: Solve for x
    x = 215,690,466.15/20,380.78
  6. Step 6: Final answer
    x = 10,583.03

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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.