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Finding the Fourth Proportional to 28,551.80, 42,836.47 and 12,770.11

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Solution

The fourth proportional to 28,551.80, 42,836.47 and 12,770.11 is: 19,159.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,551.80 : 42,836.47 = 12,770.11 : x
  2. Step 2: Convert to fraction form
    28,551.80/42,836.47 = 12,770.11/x
  3. Step 3: Cross multiply
    28,551.80x = 42,836.47 × 12,770.11
  4. Step 4: Simplify right side
    28,551.80x = 547,026,455.53
  5. Step 5: Solve for x
    x = 547,026,455.53/28,551.80
  6. Step 6: Final answer
    x = 19,159.09

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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.