Home / 12,431.32-17,155.92-7,127.02

Finding the Fourth Proportional to 12,431.32, 17,155.92 and 7,127.02

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Solution

The fourth proportional to 12,431.32, 17,155.92 and 7,127.02 is: 9,835.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,431.32 : 17,155.92 = 7,127.02 : x
  2. Step 2: Convert to fraction form
    12,431.32/17,155.92 = 7,127.02/x
  3. Step 3: Cross multiply
    12,431.32x = 17,155.92 × 7,127.02
  4. Step 4: Simplify right side
    12,431.32x = 122,270,584.96
  5. Step 5: Solve for x
    x = 122,270,584.96/12,431.32
  6. Step 6: Final answer
    x = 9,835.69

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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.