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Finding the Fourth Proportional to 12,900.91, 17,813.79 and 10,511.23

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Solution

The fourth proportional to 12,900.91, 17,813.79 and 10,511.23 is: 14,514.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,900.91 : 17,813.79 = 10,511.23 : x
  2. Step 2: Convert to fraction form
    12,900.91/17,813.79 = 10,511.23/x
  3. Step 3: Cross multiply
    12,900.91x = 17,813.79 × 10,511.23
  4. Step 4: Simplify right side
    12,900.91x = 187,244,843.86
  5. Step 5: Solve for x
    x = 187,244,843.86/12,900.91
  6. Step 6: Final answer
    x = 14,514.08

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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.