Home / 11,147.22-15,383.52-6,431.40

Finding the Fourth Proportional to 11,147.22, 15,383.52 and 6,431.40

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Solution

The fourth proportional to 11,147.22, 15,383.52 and 6,431.40 is: 8,875.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,147.22 : 15,383.52 = 6,431.40 : x
  2. Step 2: Convert to fraction form
    11,147.22/15,383.52 = 6,431.40/x
  3. Step 3: Cross multiply
    11,147.22x = 15,383.52 × 6,431.40
  4. Step 4: Simplify right side
    11,147.22x = 98,937,570.53
  5. Step 5: Solve for x
    x = 98,937,570.53/11,147.22
  6. Step 6: Final answer
    x = 8,875.54

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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.