Home / 6,917.12-9,543.84-4,120.64

Finding the Fourth Proportional to 6,917.12, 9,543.84 and 4,120.64

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Solution

The fourth proportional to 6,917.12, 9,543.84 and 4,120.64 is: 5,685.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,917.12 : 9,543.84 = 4,120.64 : x
  2. Step 2: Convert to fraction form
    6,917.12/9,543.84 = 4,120.64/x
  3. Step 3: Cross multiply
    6,917.12x = 9,543.84 × 4,120.64
  4. Step 4: Simplify right side
    6,917.12x = 39,326,728.86
  5. Step 5: Solve for x
    x = 39,326,728.86/6,917.12
  6. Step 6: Final answer
    x = 5,685.42

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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.