Home / 12,789.60-19,187.10-3,904.20

Finding the Fourth Proportional to 12,789.60, 19,187.10 and 3,904.20

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Solution

The fourth proportional to 12,789.60, 19,187.10 and 3,904.20 is: 5,857.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,789.60 : 19,187.10 = 3,904.20 : x
  2. Step 2: Convert to fraction form
    12,789.60/19,187.10 = 3,904.20/x
  3. Step 3: Cross multiply
    12,789.60x = 19,187.10 × 3,904.20
  4. Step 4: Simplify right side
    12,789.60x = 74,910,275.82
  5. Step 5: Solve for x
    x = 74,910,275.82/12,789.60
  6. Step 6: Final answer
    x = 5,857.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.