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Finding the Fourth Proportional to 19,488.78, 26,894.16 and 11,933.91

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Solution

The fourth proportional to 19,488.78, 26,894.16 and 11,933.91 is: 16,468.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,488.78 : 26,894.16 = 11,933.91 : x
  2. Step 2: Convert to fraction form
    19,488.78/26,894.16 = 11,933.91/x
  3. Step 3: Cross multiply
    19,488.78x = 26,894.16 × 11,933.91
  4. Step 4: Simplify right side
    19,488.78x = 320,952,484.97
  5. Step 5: Solve for x
    x = 320,952,484.97/19,488.78
  6. Step 6: Final answer
    x = 16,468.58

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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.