Home / 28,578.20-42,867.30-7,801.70

Finding the Fourth Proportional to 28,578.20, 42,867.30 and 7,801.70

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Solution

The fourth proportional to 28,578.20, 42,867.30 and 7,801.70 is: 11,702.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,578.20 : 42,867.30 = 7,801.70 : x
  2. Step 2: Convert to fraction form
    28,578.20/42,867.30 = 7,801.70/x
  3. Step 3: Cross multiply
    28,578.20x = 42,867.30 × 7,801.70
  4. Step 4: Simplify right side
    28,578.20x = 334,437,814.41
  5. Step 5: Solve for x
    x = 334,437,814.41/28,578.20
  6. Step 6: Final answer
    x = 11,702.55

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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.