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Finding the Fourth Proportional to 12,915.52, 19,357.03 and 6,992.17

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Solution

The fourth proportional to 12,915.52, 19,357.03 and 6,992.17 is: 10,479.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,915.52 : 19,357.03 = 6,992.17 : x
  2. Step 2: Convert to fraction form
    12,915.52/19,357.03 = 6,992.17/x
  3. Step 3: Cross multiply
    12,915.52x = 19,357.03 × 6,992.17
  4. Step 4: Simplify right side
    12,915.52x = 135,347,644.46
  5. Step 5: Solve for x
    x = 135,347,644.46/12,915.52
  6. Step 6: Final answer
    x = 10,479.46

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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.