Home / 28,569.24-42,862.64-12,787.57

Finding the Fourth Proportional to 28,569.24, 42,862.64 and 12,787.57

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Solution

The fourth proportional to 28,569.24, 42,862.64 and 12,787.57 is: 19,185.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,569.24 : 42,862.64 = 12,787.57 : x
  2. Step 2: Convert to fraction form
    28,569.24/42,862.64 = 12,787.57/x
  3. Step 3: Cross multiply
    28,569.24x = 42,862.64 × 12,787.57
  4. Step 4: Simplify right side
    28,569.24x = 548,108,999.03
  5. Step 5: Solve for x
    x = 548,108,999.03/28,569.24
  6. Step 6: Final answer
    x = 19,185.28

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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.