Home / 21,864.57-30,169.58-12,910.83

Finding the Fourth Proportional to 21,864.57, 30,169.58 and 12,910.83

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Solution

The fourth proportional to 21,864.57, 30,169.58 and 12,910.83 is: 17,814.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,864.57 : 30,169.58 = 12,910.83 : x
  2. Step 2: Convert to fraction form
    21,864.57/30,169.58 = 12,910.83/x
  3. Step 3: Cross multiply
    21,864.57x = 30,169.58 × 12,910.83
  4. Step 4: Simplify right side
    21,864.57x = 389,514,254.00
  5. Step 5: Solve for x
    x = 389,514,254.00/21,864.57
  6. Step 6: Final answer
    x = 17,814.86

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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.