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Finding the Fourth Proportional to 6,988.85, 9,644.46 and 4,006.45

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Solution

The fourth proportional to 6,988.85, 9,644.46 and 4,006.45 is: 5,528.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,988.85 : 9,644.46 = 4,006.45 : x
  2. Step 2: Convert to fraction form
    6,988.85/9,644.46 = 4,006.45/x
  3. Step 3: Cross multiply
    6,988.85x = 9,644.46 × 4,006.45
  4. Step 4: Simplify right side
    6,988.85x = 38,640,046.77
  5. Step 5: Solve for x
    x = 38,640,046.77/6,988.85
  6. Step 6: Final answer
    x = 5,528.81

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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.