Home / 11,349.20-15,629.64-8,200.40

Finding the Fourth Proportional to 11,349.20, 15,629.64 and 8,200.40

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Solution

The fourth proportional to 11,349.20, 15,629.64 and 8,200.40 is: 11,293.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,349.20 : 15,629.64 = 8,200.40 : x
  2. Step 2: Convert to fraction form
    11,349.20/15,629.64 = 8,200.40/x
  3. Step 3: Cross multiply
    11,349.20x = 15,629.64 × 8,200.40
  4. Step 4: Simplify right side
    11,349.20x = 128,169,299.86
  5. Step 5: Solve for x
    x = 128,169,299.86/11,349.20
  6. Step 6: Final answer
    x = 11,293.25

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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.