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Finding the Fourth Proportional to 19,859.90, 27,404.60 and 11,901.92

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Solution

The fourth proportional to 19,859.90, 27,404.60 and 11,901.92 is: 16,423.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,859.90 : 27,404.60 = 11,901.92 : x
  2. Step 2: Convert to fraction form
    19,859.90/27,404.60 = 11,901.92/x
  3. Step 3: Cross multiply
    19,859.90x = 27,404.60 × 11,901.92
  4. Step 4: Simplify right side
    19,859.90x = 326,167,356.83
  5. Step 5: Solve for x
    x = 326,167,356.83/19,859.90
  6. Step 6: Final answer
    x = 16,423.41

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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.