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Finding the Fourth Proportional to 6,810.45, 9,398.85 and 5,128.89

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Solution

The fourth proportional to 6,810.45, 9,398.85 and 5,128.89 is: 7,078.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,810.45 : 9,398.85 = 5,128.89 : x
  2. Step 2: Convert to fraction form
    6,810.45/9,398.85 = 5,128.89/x
  3. Step 3: Cross multiply
    6,810.45x = 9,398.85 × 5,128.89
  4. Step 4: Simplify right side
    6,810.45x = 48,205,667.78
  5. Step 5: Solve for x
    x = 48,205,667.78/6,810.45
  6. Step 6: Final answer
    x = 7,078.19

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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.