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Finding the Fourth Proportional to 7,990.95, 11,012.31 and 5,748.87

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Solution

The fourth proportional to 7,990.95, 11,012.31 and 5,748.87 is: 7,922.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,990.95 : 11,012.31 = 5,748.87 : x
  2. Step 2: Convert to fraction form
    7,990.95/11,012.31 = 5,748.87/x
  3. Step 3: Cross multiply
    7,990.95x = 11,012.31 × 5,748.87
  4. Step 4: Simplify right side
    7,990.95x = 63,308,338.59
  5. Step 5: Solve for x
    x = 63,308,338.59/7,990.95
  6. Step 6: Final answer
    x = 7,922.50

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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.