Home / 9,921.70-13,690.90-5,673.86

Finding the Fourth Proportional to 9,921.70, 13,690.90 and 5,673.86

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Solution

The fourth proportional to 9,921.70, 13,690.90 and 5,673.86 is: 7,829.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,921.70 : 13,690.90 = 5,673.86 : x
  2. Step 2: Convert to fraction form
    9,921.70/13,690.90 = 5,673.86/x
  3. Step 3: Cross multiply
    9,921.70x = 13,690.90 × 5,673.86
  4. Step 4: Simplify right side
    9,921.70x = 77,680,249.87
  5. Step 5: Solve for x
    x = 77,680,249.87/9,921.70
  6. Step 6: Final answer
    x = 7,829.33

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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.