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Finding the Fourth Proportional to 9,398.55, 12,969.10 and 5,620.95

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Solution

The fourth proportional to 9,398.55, 12,969.10 and 5,620.95 is: 7,756.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,398.55 : 12,969.10 = 5,620.95 : x
  2. Step 2: Convert to fraction form
    9,398.55/12,969.10 = 5,620.95/x
  3. Step 3: Cross multiply
    9,398.55x = 12,969.10 × 5,620.95
  4. Step 4: Simplify right side
    9,398.55x = 72,898,634.54
  5. Step 5: Solve for x
    x = 72,898,634.54/9,398.55
  6. Step 6: Final answer
    x = 7,756.37

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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.