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Finding the Fourth Proportional to 6,699.20, 10,048.80 and 4,220.60

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Solution

The fourth proportional to 6,699.20, 10,048.80 and 4,220.60 is: 6,330.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,699.20 : 10,048.80 = 4,220.60 : x
  2. Step 2: Convert to fraction form
    6,699.20/10,048.80 = 4,220.60/x
  3. Step 3: Cross multiply
    6,699.20x = 10,048.80 × 4,220.60
  4. Step 4: Simplify right side
    6,699.20x = 42,411,965.28
  5. Step 5: Solve for x
    x = 42,411,965.28/6,699.20
  6. Step 6: Final answer
    x = 6,330.90

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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.