Home / 15,715.10-23,572.65-12,215.90

Finding the Fourth Proportional to 15,715.10, 23,572.65 and 12,215.90

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Solution

The fourth proportional to 15,715.10, 23,572.65 and 12,215.90 is: 18,323.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,715.10 : 23,572.65 = 12,215.90 : x
  2. Step 2: Convert to fraction form
    15,715.10/23,572.65 = 12,215.90/x
  3. Step 3: Cross multiply
    15,715.10x = 23,572.65 × 12,215.90
  4. Step 4: Simplify right side
    15,715.10x = 287,961,135.14
  5. Step 5: Solve for x
    x = 287,961,135.14/15,715.10
  6. Step 6: Final answer
    x = 18,323.85

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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.