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Finding the Fourth Proportional to 6,877.77, 9,491.91 and 3,894.13

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Solution

The fourth proportional to 6,877.77, 9,491.91 and 3,894.13 is: 5,374.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,877.77 : 9,491.91 = 3,894.13 : x
  2. Step 2: Convert to fraction form
    6,877.77/9,491.91 = 3,894.13/x
  3. Step 3: Cross multiply
    6,877.77x = 9,491.91 × 3,894.13
  4. Step 4: Simplify right side
    6,877.77x = 36,962,731.49
  5. Step 5: Solve for x
    x = 36,962,731.49/6,877.77
  6. Step 6: Final answer
    x = 5,374.23

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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.