Home / 13,856.85-20,788.92-5,091.84

Finding the Fourth Proportional to 13,856.85, 20,788.92 and 5,091.84

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Solution

The fourth proportional to 13,856.85, 20,788.92 and 5,091.84 is: 7,639.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,856.85 : 20,788.92 = 5,091.84 : x
  2. Step 2: Convert to fraction form
    13,856.85/20,788.92 = 5,091.84/x
  3. Step 3: Cross multiply
    13,856.85x = 20,788.92 × 5,091.84
  4. Step 4: Simplify right side
    13,856.85x = 105,853,854.41
  5. Step 5: Solve for x
    x = 105,853,854.41/13,856.85
  6. Step 6: Final answer
    x = 7,639.10

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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.