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Finding the Fourth Proportional to 9,341.31, 12,915.62 and 8,928.21

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Solution

The fourth proportional to 9,341.31, 12,915.62 and 8,928.21 is: 12,344.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,341.31 : 12,915.62 = 8,928.21 : x
  2. Step 2: Convert to fraction form
    9,341.31/12,915.62 = 8,928.21/x
  3. Step 3: Cross multiply
    9,341.31x = 12,915.62 × 8,928.21
  4. Step 4: Simplify right side
    9,341.31x = 115,313,367.64
  5. Step 5: Solve for x
    x = 115,313,367.64/9,341.31
  6. Step 6: Final answer
    x = 12,344.45

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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.