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Finding the Fourth Proportional to 19,873.20, 27,424.84 and 10,920.80

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Solution

The fourth proportional to 19,873.20, 27,424.84 and 10,920.80 is: 15,070.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,873.20 : 27,424.84 = 10,920.80 : x
  2. Step 2: Convert to fraction form
    19,873.20/27,424.84 = 10,920.80/x
  3. Step 3: Cross multiply
    19,873.20x = 27,424.84 × 10,920.80
  4. Step 4: Simplify right side
    19,873.20x = 299,501,192.67
  5. Step 5: Solve for x
    x = 299,501,192.67/19,873.20
  6. Step 6: Final answer
    x = 15,070.61

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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.