Home / 11,391.74-15,720.65-6,355.86

Finding the Fourth Proportional to 11,391.74, 15,720.65 and 6,355.86

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Solution

The fourth proportional to 11,391.74, 15,720.65 and 6,355.86 is: 8,771.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,391.74 : 15,720.65 = 6,355.86 : x
  2. Step 2: Convert to fraction form
    11,391.74/15,720.65 = 6,355.86/x
  3. Step 3: Cross multiply
    11,391.74x = 15,720.65 × 6,355.86
  4. Step 4: Simplify right side
    11,391.74x = 99,918,277.68
  5. Step 5: Solve for x
    x = 99,918,277.68/11,391.74
  6. Step 6: Final answer
    x = 8,771.12

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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.