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Finding the Fourth Proportional to 7,029.40, 9,705.05 and 4,380.70

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Solution

The fourth proportional to 7,029.40, 9,705.05 and 4,380.70 is: 6,048.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,029.40 : 9,705.05 = 4,380.70 : x
  2. Step 2: Convert to fraction form
    7,029.40/9,705.05 = 4,380.70/x
  3. Step 3: Cross multiply
    7,029.40x = 9,705.05 × 4,380.70
  4. Step 4: Simplify right side
    7,029.40x = 42,514,912.54
  5. Step 5: Solve for x
    x = 42,514,912.54/7,029.40
  6. Step 6: Final answer
    x = 6,048.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.