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Finding the Fourth Proportional to 9,321.68, 12,859.08 and 7,555.28

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Solution

The fourth proportional to 9,321.68, 12,859.08 and 7,555.28 is: 10,422.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,321.68 : 12,859.08 = 7,555.28 : x
  2. Step 2: Convert to fraction form
    9,321.68/12,859.08 = 7,555.28/x
  3. Step 3: Cross multiply
    9,321.68x = 12,859.08 × 7,555.28
  4. Step 4: Simplify right side
    9,321.68x = 97,153,949.94
  5. Step 5: Solve for x
    x = 97,153,949.94/9,321.68
  6. Step 6: Final answer
    x = 10,422.36

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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.