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Finding the Fourth Proportional to 17,920.80, 26,881.20 and 17,629.20

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Solution

The fourth proportional to 17,920.80, 26,881.20 and 17,629.20 is: 26,443.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    17,920.80 : 26,881.20 = 17,629.20 : x
  2. Step 2: Convert to fraction form
    17,920.80/26,881.20 = 17,629.20/x
  3. Step 3: Cross multiply
    17,920.80x = 26,881.20 × 17,629.20
  4. Step 4: Simplify right side
    17,920.80x = 473,894,051.04
  5. Step 5: Solve for x
    x = 473,894,051.04/17,920.80
  6. Step 6: Final answer
    x = 26,443.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.