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Finding the Fourth Proportional to 12,608.13, 18,915.16 and 7,065.30

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Solution

The fourth proportional to 12,608.13, 18,915.16 and 7,065.30 is: 10,599.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,608.13 : 18,915.16 = 7,065.30 : x
  2. Step 2: Convert to fraction form
    12,608.13/18,915.16 = 7,065.30/x
  3. Step 3: Cross multiply
    12,608.13x = 18,915.16 × 7,065.30
  4. Step 4: Simplify right side
    12,608.13x = 133,641,283.33
  5. Step 5: Solve for x
    x = 133,641,283.33/12,608.13
  6. Step 6: Final answer
    x = 10,599.61

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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.