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Finding the Fourth Proportional to 7,959.95, 10,959.64 and 7,221.84

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Solution

The fourth proportional to 7,959.95, 10,959.64 and 7,221.84 is: 9,943.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.95 : 10,959.64 = 7,221.84 : x
  2. Step 2: Convert to fraction form
    7,959.95/10,959.64 = 7,221.84/x
  3. Step 3: Cross multiply
    7,959.95x = 10,959.64 × 7,221.84
  4. Step 4: Simplify right side
    7,959.95x = 79,148,707.38
  5. Step 5: Solve for x
    x = 79,148,707.38/7,959.95
  6. Step 6: Final answer
    x = 9,943.37

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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.