Home / 13,631.28-18,811.47-8,329.02

Finding the Fourth Proportional to 13,631.28, 18,811.47 and 8,329.02

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Solution

The fourth proportional to 13,631.28, 18,811.47 and 8,329.02 is: 11,494.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,631.28 : 18,811.47 = 8,329.02 : x
  2. Step 2: Convert to fraction form
    13,631.28/18,811.47 = 8,329.02/x
  3. Step 3: Cross multiply
    13,631.28x = 18,811.47 × 8,329.02
  4. Step 4: Simplify right side
    13,631.28x = 156,681,109.86
  5. Step 5: Solve for x
    x = 156,681,109.86/13,631.28
  6. Step 6: Final answer
    x = 11,494.23

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.