Home / 13,318.40-20,007.30-11,131.40

Finding the Fourth Proportional to 13,318.40, 20,007.30 and 11,131.40

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Solution

The fourth proportional to 13,318.40, 20,007.30 and 11,131.40 is: 16,721.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,318.40 : 20,007.30 = 11,131.40 : x
  2. Step 2: Convert to fraction form
    13,318.40/20,007.30 = 11,131.40/x
  3. Step 3: Cross multiply
    13,318.40x = 20,007.30 × 11,131.40
  4. Step 4: Simplify right side
    13,318.40x = 222,709,259.22
  5. Step 5: Solve for x
    x = 222,709,259.22/13,318.40
  6. Step 6: Final answer
    x = 16,721.92

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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.