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Finding the Fourth Proportional to 18,810.20, 28,208.02 and 10,040.34

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Solution

The fourth proportional to 18,810.20, 28,208.02 and 10,040.34 is: 15,056.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,810.20 : 28,208.02 = 10,040.34 : x
  2. Step 2: Convert to fraction form
    18,810.20/28,208.02 = 10,040.34/x
  3. Step 3: Cross multiply
    18,810.20x = 28,208.02 × 10,040.34
  4. Step 4: Simplify right side
    18,810.20x = 283,218,111.53
  5. Step 5: Solve for x
    x = 283,218,111.53/18,810.20
  6. Step 6: Final answer
    x = 15,056.62

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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.