Home / 11,155.32-15,385.80-8,170.08

Finding the Fourth Proportional to 11,155.32, 15,385.80 and 8,170.08

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Solution

The fourth proportional to 11,155.32, 15,385.80 and 8,170.08 is: 11,268.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,155.32 : 15,385.80 = 8,170.08 : x
  2. Step 2: Convert to fraction form
    11,155.32/15,385.80 = 8,170.08/x
  3. Step 3: Cross multiply
    11,155.32x = 15,385.80 × 8,170.08
  4. Step 4: Simplify right side
    11,155.32x = 125,703,216.86
  5. Step 5: Solve for x
    x = 125,703,216.86/11,155.32
  6. Step 6: Final answer
    x = 11,268.45

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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.