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Finding the Fourth Proportional to 12,750.89, 19,126.87 and 7,817.45

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Solution

The fourth proportional to 12,750.89, 19,126.87 and 7,817.45 is: 11,726.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,750.89 : 19,126.87 = 7,817.45 : x
  2. Step 2: Convert to fraction form
    12,750.89/19,126.87 = 7,817.45/x
  3. Step 3: Cross multiply
    12,750.89x = 19,126.87 × 7,817.45
  4. Step 4: Simplify right side
    12,750.89x = 149,523,234.70
  5. Step 5: Solve for x
    x = 149,523,234.70/12,750.89
  6. Step 6: Final answer
    x = 11,726.50

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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.