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Finding the Fourth Proportional to 18,630.31, 27,938.71 and 10,203.08

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Solution

The fourth proportional to 18,630.31, 27,938.71 and 10,203.08 is: 15,300.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,630.31 : 27,938.71 = 10,203.08 : x
  2. Step 2: Convert to fraction form
    18,630.31/27,938.71 = 10,203.08/x
  3. Step 3: Cross multiply
    18,630.31x = 27,938.71 × 10,203.08
  4. Step 4: Simplify right side
    18,630.31x = 285,060,742.80
  5. Step 5: Solve for x
    x = 285,060,742.80/18,630.31
  6. Step 6: Final answer
    x = 15,300.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.