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Finding the Fourth Proportional to 13,152.70, 19,729.05 and 7,903.90

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Solution

The fourth proportional to 13,152.70, 19,729.05 and 7,903.90 is: 11,855.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,152.70 : 19,729.05 = 7,903.90 : x
  2. Step 2: Convert to fraction form
    13,152.70/19,729.05 = 7,903.90/x
  3. Step 3: Cross multiply
    13,152.70x = 19,729.05 × 7,903.90
  4. Step 4: Simplify right side
    13,152.70x = 155,936,438.30
  5. Step 5: Solve for x
    x = 155,936,438.30/13,152.70
  6. Step 6: Final answer
    x = 11,855.85

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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.