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Finding the Fourth Proportional to 6,972.63, 9,622.90 and 3,987.89

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Solution

The fourth proportional to 6,972.63, 9,622.90 and 3,987.89 is: 5,503.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,972.63 : 9,622.90 = 3,987.89 : x
  2. Step 2: Convert to fraction form
    6,972.63/9,622.90 = 3,987.89/x
  3. Step 3: Cross multiply
    6,972.63x = 9,622.90 × 3,987.89
  4. Step 4: Simplify right side
    6,972.63x = 38,375,018.57
  5. Step 5: Solve for x
    x = 38,375,018.57/6,972.63
  6. Step 6: Final answer
    x = 5,503.66

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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.