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Finding the Fourth Proportional to 18,679.08, 25,776.20 and 10,721.12

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Solution

The fourth proportional to 18,679.08, 25,776.20 and 10,721.12 is: 14,794.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,679.08 : 25,776.20 = 10,721.12 : x
  2. Step 2: Convert to fraction form
    18,679.08/25,776.20 = 10,721.12/x
  3. Step 3: Cross multiply
    18,679.08x = 25,776.20 × 10,721.12
  4. Step 4: Simplify right side
    18,679.08x = 276,349,733.34
  5. Step 5: Solve for x
    x = 276,349,733.34/18,679.08
  6. Step 6: Final answer
    x = 14,794.61

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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.