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Finding the Fourth Proportional to 13,298.70, 19,950.98 and 3,939.45

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Solution

The fourth proportional to 13,298.70, 19,950.98 and 3,939.45 is: 5,910.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,298.70 : 19,950.98 = 3,939.45 : x
  2. Step 2: Convert to fraction form
    13,298.70/19,950.98 = 3,939.45/x
  3. Step 3: Cross multiply
    13,298.70x = 19,950.98 × 3,939.45
  4. Step 4: Simplify right side
    13,298.70x = 78,595,868.46
  5. Step 5: Solve for x
    x = 78,595,868.46/13,298.70
  6. Step 6: Final answer
    x = 5,910.04

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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.