Home / 31,121.80-46,652.32-12,396.20

Finding the Fourth Proportional to 31,121.80, 46,652.32 and 12,396.20

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Solution

The fourth proportional to 31,121.80, 46,652.32 and 12,396.20 is: 18,582.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,121.80 : 46,652.32 = 12,396.20 : x
  2. Step 2: Convert to fraction form
    31,121.80/46,652.32 = 12,396.20/x
  3. Step 3: Cross multiply
    31,121.80x = 46,652.32 × 12,396.20
  4. Step 4: Simplify right side
    31,121.80x = 578,311,489.18
  5. Step 5: Solve for x
    x = 578,311,489.18/31,121.80
  6. Step 6: Final answer
    x = 18,582.20

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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.