Home / 15,511.87-23,281.24-8,121.50

Finding the Fourth Proportional to 15,511.87, 23,281.24 and 8,121.50

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Solution

The fourth proportional to 15,511.87, 23,281.24 and 8,121.50 is: 12,189.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,511.87 : 23,281.24 = 8,121.50 : x
  2. Step 2: Convert to fraction form
    15,511.87/23,281.24 = 8,121.50/x
  3. Step 3: Cross multiply
    15,511.87x = 23,281.24 × 8,121.50
  4. Step 4: Simplify right side
    15,511.87x = 189,078,590.66
  5. Step 5: Solve for x
    x = 189,078,590.66/15,511.87
  6. Step 6: Final answer
    x = 12,189.28

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1.5x scale

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.