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Finding the Fourth Proportional to 19,310.70, 28,977.01 and 10,425.92

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Solution

The fourth proportional to 19,310.70, 28,977.01 and 10,425.92 is: 15,644.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,310.70 : 28,977.01 = 10,425.92 : x
  2. Step 2: Convert to fraction form
    19,310.70/28,977.01 = 10,425.92/x
  3. Step 3: Cross multiply
    19,310.70x = 28,977.01 × 10,425.92
  4. Step 4: Simplify right side
    19,310.70x = 302,111,875.80
  5. Step 5: Solve for x
    x = 302,111,875.80/19,310.70
  6. Step 6: Final answer
    x = 15,644.79

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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.