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Finding the Fourth Proportional to 13,251.15, 19,871.78 and 4,483.71

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Solution

The fourth proportional to 13,251.15, 19,871.78 and 4,483.71 is: 6,723.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,251.15 : 19,871.78 = 4,483.71 : x
  2. Step 2: Convert to fraction form
    13,251.15/19,871.78 = 4,483.71/x
  3. Step 3: Cross multiply
    13,251.15x = 19,871.78 × 4,483.71
  4. Step 4: Simplify right side
    13,251.15x = 89,099,276.29
  5. Step 5: Solve for x
    x = 89,099,276.29/13,251.15
  6. Step 6: Final answer
    x = 6,723.89

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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.