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Finding the Fourth Proportional to 7,721.17, 11,513.96 and 7,651.02

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Solution

The fourth proportional to 7,721.17, 11,513.96 and 7,651.02 is: 11,409.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,721.17 : 11,513.96 = 7,651.02 : x
  2. Step 2: Convert to fraction form
    7,721.17/11,513.96 = 7,651.02/x
  3. Step 3: Cross multiply
    7,721.17x = 11,513.96 × 7,651.02
  4. Step 4: Simplify right side
    7,721.17x = 88,093,538.24
  5. Step 5: Solve for x
    x = 88,093,538.24/7,721.17
  6. Step 6: Final answer
    x = 11,409.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.