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Finding the Fourth Proportional to 7,959.66, 10,988.91 and 5,315.82

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Solution

The fourth proportional to 7,959.66, 10,988.91 and 5,315.82 is: 7,338.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.66 : 10,988.91 = 5,315.82 : x
  2. Step 2: Convert to fraction form
    7,959.66/10,988.91 = 5,315.82/x
  3. Step 3: Cross multiply
    7,959.66x = 10,988.91 × 5,315.82
  4. Step 4: Simplify right side
    7,959.66x = 58,415,067.56
  5. Step 5: Solve for x
    x = 58,415,067.56/7,959.66
  6. Step 6: Final answer
    x = 7,338.89

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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.