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Finding the Fourth Proportional to 9,603.28, 13,236.78 and 9,428.32

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Solution

The fourth proportional to 9,603.28, 13,236.78 and 9,428.32 is: 12,995.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,603.28 : 13,236.78 = 9,428.32 : x
  2. Step 2: Convert to fraction form
    9,603.28/13,236.78 = 9,428.32/x
  3. Step 3: Cross multiply
    9,603.28x = 13,236.78 × 9,428.32
  4. Step 4: Simplify right side
    9,603.28x = 124,800,597.61
  5. Step 5: Solve for x
    x = 124,800,597.61/9,603.28
  6. Step 6: Final answer
    x = 12,995.62

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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.