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Finding the Fourth Proportional to 34,291.20, 51,475.20 and 18,700.80

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Solution

The fourth proportional to 34,291.20, 51,475.20 and 18,700.80 is: 28,072.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    34,291.20 : 51,475.20 = 18,700.80 : x
  2. Step 2: Convert to fraction form
    34,291.20/51,475.20 = 18,700.80/x
  3. Step 3: Cross multiply
    34,291.20x = 51,475.20 × 18,700.80
  4. Step 4: Simplify right side
    34,291.20x = 962,627,420.16
  5. Step 5: Solve for x
    x = 962,627,420.16/34,291.20
  6. Step 6: Final answer
    x = 28,072.14

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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.