Home / 12,472.80-18,702.64-3,706.40

Finding the Fourth Proportional to 12,472.80, 18,702.64 and 3,706.40

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Solution

The fourth proportional to 12,472.80, 18,702.64 and 3,706.40 is: 5,557.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,472.80 : 18,702.64 = 3,706.40 : x
  2. Step 2: Convert to fraction form
    12,472.80/18,702.64 = 3,706.40/x
  3. Step 3: Cross multiply
    12,472.80x = 18,702.64 × 3,706.40
  4. Step 4: Simplify right side
    12,472.80x = 69,319,464.90
  5. Step 5: Solve for x
    x = 69,319,464.90/12,472.80
  6. Step 6: Final answer
    x = 5,557.65

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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.