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Finding the Fourth Proportional to 7,020, 10,530 and 4,249.80

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Solution

The fourth proportional to 7,020, 10,530 and 4,249.80 is: 6,374.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,020 : 10,530 = 4,249.80 : x
  2. Step 2: Convert to fraction form
    7,020/10,530 = 4,249.80/x
  3. Step 3: Cross multiply
    7,020x = 10,530 × 4,249.80
  4. Step 4: Simplify right side
    7,020x = 44,750,394
  5. Step 5: Solve for x
    x = 44,750,394/7,020
  6. Step 6: Final answer
    x = 6,374.70

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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.