Home / 28,569.70-42,863.28-12,787.98

Finding the Fourth Proportional to 28,569.70, 42,863.28 and 12,787.98

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Solution

The fourth proportional to 28,569.70, 42,863.28 and 12,787.98 is: 19,185.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,569.70 : 42,863.28 = 12,787.98 : x
  2. Step 2: Convert to fraction form
    28,569.70/42,863.28 = 12,787.98/x
  3. Step 3: Cross multiply
    28,569.70x = 42,863.28 × 12,787.98
  4. Step 4: Simplify right side
    28,569.70x = 548,134,767.37
  5. Step 5: Solve for x
    x = 548,134,767.37/28,569.70
  6. Step 6: Final answer
    x = 19,185.88

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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.