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Finding the Fourth Proportional to 18,518.31, 25,555.09 and 10,020.25

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Solution

The fourth proportional to 18,518.31, 25,555.09 and 10,020.25 is: 13,827.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,518.31 : 25,555.09 = 10,020.25 : x
  2. Step 2: Convert to fraction form
    18,518.31/25,555.09 = 10,020.25/x
  3. Step 3: Cross multiply
    18,518.31x = 25,555.09 × 10,020.25
  4. Step 4: Simplify right side
    18,518.31x = 256,068,212.70
  5. Step 5: Solve for x
    x = 256,068,212.70/18,518.31
  6. Step 6: Final answer
    x = 13,827.84

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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.