Home / 13,867.11-20,800.65-3,478.86

Finding the Fourth Proportional to 13,867.11, 20,800.65 and 3,478.86

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Solution

The fourth proportional to 13,867.11, 20,800.65 and 3,478.86 is: 5,218.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,867.11 : 20,800.65 = 3,478.86 : x
  2. Step 2: Convert to fraction form
    13,867.11/20,800.65 = 3,478.86/x
  3. Step 3: Cross multiply
    13,867.11x = 20,800.65 × 3,478.86
  4. Step 4: Simplify right side
    13,867.11x = 72,362,549.26
  5. Step 5: Solve for x
    x = 72,362,549.26/13,867.11
  6. Step 6: Final answer
    x = 5,218.29

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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.