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Finding the Fourth Proportional to 8,694.72, 12,007.23 and 7,428.39

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Solution

The fourth proportional to 8,694.72, 12,007.23 and 7,428.39 is: 10,258.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,694.72 : 12,007.23 = 7,428.39 : x
  2. Step 2: Convert to fraction form
    8,694.72/12,007.23 = 7,428.39/x
  3. Step 3: Cross multiply
    8,694.72x = 12,007.23 × 7,428.39
  4. Step 4: Simplify right side
    8,694.72x = 89,194,387.26
  5. Step 5: Solve for x
    x = 89,194,387.26/8,694.72
  6. Step 6: Final answer
    x = 10,258.45

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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.