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Finding the Fourth Proportional to 7,051.20, 9,721.20 and 5,851.68

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Solution

The fourth proportional to 7,051.20, 9,721.20 and 5,851.68 is: 8,067.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,051.20 : 9,721.20 = 5,851.68 : x
  2. Step 2: Convert to fraction form
    7,051.20/9,721.20 = 5,851.68/x
  3. Step 3: Cross multiply
    7,051.20x = 9,721.20 × 5,851.68
  4. Step 4: Simplify right side
    7,051.20x = 56,885,351.62
  5. Step 5: Solve for x
    x = 56,885,351.62/7,051.20
  6. Step 6: Final answer
    x = 8,067.47

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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.