Home / 12,456.36-17,187.96-7,151.40

Finding the Fourth Proportional to 12,456.36, 17,187.96 and 7,151.40

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Solution

The fourth proportional to 12,456.36, 17,187.96 and 7,151.40 is: 9,867.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,456.36 : 17,187.96 = 7,151.40 : x
  2. Step 2: Convert to fraction form
    12,456.36/17,187.96 = 7,151.40/x
  3. Step 3: Cross multiply
    12,456.36x = 17,187.96 × 7,151.40
  4. Step 4: Simplify right side
    12,456.36x = 122,917,977.14
  5. Step 5: Solve for x
    x = 122,917,977.14/12,456.36
  6. Step 6: Final answer
    x = 9,867.89

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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.