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Finding the Fourth Proportional to 18,672.40, 25,767.80 and 10,288.88

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Solution

The fourth proportional to 18,672.40, 25,767.80 and 10,288.88 is: 14,198.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,672.40 : 25,767.80 = 10,288.88 : x
  2. Step 2: Convert to fraction form
    18,672.40/25,767.80 = 10,288.88/x
  3. Step 3: Cross multiply
    18,672.40x = 25,767.80 × 10,288.88
  4. Step 4: Simplify right side
    18,672.40x = 265,121,802.06
  5. Step 5: Solve for x
    x = 265,121,802.06/18,672.40
  6. Step 6: Final answer
    x = 14,198.59

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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.