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Finding the Fourth Proportional to 28,821.14, 39,773.14 and 15,573.14

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Solution

The fourth proportional to 28,821.14, 39,773.14 and 15,573.14 is: 21,490.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,821.14 : 39,773.14 = 15,573.14 : x
  2. Step 2: Convert to fraction form
    28,821.14/39,773.14 = 15,573.14/x
  3. Step 3: Cross multiply
    28,821.14x = 39,773.14 × 15,573.14
  4. Step 4: Simplify right side
    28,821.14x = 619,392,677.46
  5. Step 5: Solve for x
    x = 619,392,677.46/28,821.14
  6. Step 6: Final answer
    x = 21,490.92

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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.