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Finding the Fourth Proportional to 6,721.66, 9,277.11 and 3,888.70

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Solution

The fourth proportional to 6,721.66, 9,277.11 and 3,888.70 is: 5,367.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,721.66 : 9,277.11 = 3,888.70 : x
  2. Step 2: Convert to fraction form
    6,721.66/9,277.11 = 3,888.70/x
  3. Step 3: Cross multiply
    6,721.66x = 9,277.11 × 3,888.70
  4. Step 4: Simplify right side
    6,721.66x = 36,075,897.66
  5. Step 5: Solve for x
    x = 36,075,897.66/6,721.66
  6. Step 6: Final answer
    x = 5,367.11

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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.