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Finding the Fourth Proportional to 19,398.76, 26,764.14 and 11,443.72

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Solution

The fourth proportional to 19,398.76, 26,764.14 and 11,443.72 is: 15,788.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,398.76 : 26,764.14 = 11,443.72 : x
  2. Step 2: Convert to fraction form
    19,398.76/26,764.14 = 11,443.72/x
  3. Step 3: Cross multiply
    19,398.76x = 26,764.14 × 11,443.72
  4. Step 4: Simplify right side
    19,398.76x = 306,281,324.20
  5. Step 5: Solve for x
    x = 306,281,324.20/19,398.76
  6. Step 6: Final answer
    x = 15,788.71

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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.