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Finding the Fourth Proportional to 18,633.68, 25,721.20 and 12,348.08

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Solution

The fourth proportional to 18,633.68, 25,721.20 and 12,348.08 is: 17,044.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,633.68 : 25,721.20 = 12,348.08 : x
  2. Step 2: Convert to fraction form
    18,633.68/25,721.20 = 12,348.08/x
  3. Step 3: Cross multiply
    18,633.68x = 25,721.20 × 12,348.08
  4. Step 4: Simplify right side
    18,633.68x = 317,607,435.30
  5. Step 5: Solve for x
    x = 317,607,435.30/18,633.68
  6. Step 6: Final answer
    x = 17,044.80

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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.