Home / 12,455.10-17,187.39-7,739.28

Finding the Fourth Proportional to 12,455.10, 17,187.39 and 7,739.28

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Solution

The fourth proportional to 12,455.10, 17,187.39 and 7,739.28 is: 10,679.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,455.10 : 17,187.39 = 7,739.28 : x
  2. Step 2: Convert to fraction form
    12,455.10/17,187.39 = 7,739.28/x
  3. Step 3: Cross multiply
    12,455.10x = 17,187.39 × 7,739.28
  4. Step 4: Simplify right side
    12,455.10x = 133,018,023.68
  5. Step 5: Solve for x
    x = 133,018,023.68/12,455.10
  6. Step 6: Final answer
    x = 10,679.80

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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.