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Finding the Fourth Proportional to 9,718.40, 14,534.40 and 8,163.20

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Solution

The fourth proportional to 9,718.40, 14,534.40 and 8,163.20 is: 12,208.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,718.40 : 14,534.40 = 8,163.20 : x
  2. Step 2: Convert to fraction form
    9,718.40/14,534.40 = 8,163.20/x
  3. Step 3: Cross multiply
    9,718.40x = 14,534.40 × 8,163.20
  4. Step 4: Simplify right side
    9,718.40x = 118,647,214.08
  5. Step 5: Solve for x
    x = 118,647,214.08/9,718.40
  6. Step 6: Final answer
    x = 12,208.51

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.