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Finding the Fourth Proportional to 18,828.19, 25,980.20 and 11,272.71

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Solution

The fourth proportional to 18,828.19, 25,980.20 and 11,272.71 is: 15,554.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,828.19 : 25,980.20 = 11,272.71 : x
  2. Step 2: Convert to fraction form
    18,828.19/25,980.20 = 11,272.71/x
  3. Step 3: Cross multiply
    18,828.19x = 25,980.20 × 11,272.71
  4. Step 4: Simplify right side
    18,828.19x = 292,867,260.34
  5. Step 5: Solve for x
    x = 292,867,260.34/18,828.19
  6. Step 6: Final answer
    x = 15,554.72

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Double scale
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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.