Home / 12,788.40-19,139.40-11,233.20

Finding the Fourth Proportional to 12,788.40, 19,139.40 and 11,233.20

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Solution

The fourth proportional to 12,788.40, 19,139.40 and 11,233.20 is: 16,811.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,788.40 : 19,139.40 = 11,233.20 : x
  2. Step 2: Convert to fraction form
    12,788.40/19,139.40 = 11,233.20/x
  3. Step 3: Cross multiply
    12,788.40x = 19,139.40 × 11,233.20
  4. Step 4: Simplify right side
    12,788.40x = 214,996,708.08
  5. Step 5: Solve for x
    x = 214,996,708.08/12,788.40
  6. Step 6: Final answer
    x = 16,811.85

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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.