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Finding the Fourth Proportional to 7,480.30, 11,208.30 and 7,042.90

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Solution

The fourth proportional to 7,480.30, 11,208.30 and 7,042.90 is: 10,552.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,480.30 : 11,208.30 = 7,042.90 : x
  2. Step 2: Convert to fraction form
    7,480.30/11,208.30 = 7,042.90/x
  3. Step 3: Cross multiply
    7,480.30x = 11,208.30 × 7,042.90
  4. Step 4: Simplify right side
    7,480.30x = 78,938,936.07
  5. Step 5: Solve for x
    x = 78,938,936.07/7,480.30
  6. Step 6: Final answer
    x = 10,552.91

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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.