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Finding the Fourth Proportional to 20,400.70, 30,605.80 and 6,360

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Solution

The fourth proportional to 20,400.70, 30,605.80 and 6,360 is: 9,541.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.70 : 30,605.80 = 6,360 : x
  2. Step 2: Convert to fraction form
    20,400.70/30,605.80 = 6,360/x
  3. Step 3: Cross multiply
    20,400.70x = 30,605.80 × 6,360
  4. Step 4: Simplify right side
    20,400.70x = 194,652,888
  5. Step 5: Solve for x
    x = 194,652,888/20,400.70
  6. Step 6: Final answer
    x = 9,541.48

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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.