Home / 22,612.12-31,208.38-13,178.86

Finding the Fourth Proportional to 22,612.12, 31,208.38 and 13,178.86

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Solution

The fourth proportional to 22,612.12, 31,208.38 and 13,178.86 is: 18,188.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,612.12 : 31,208.38 = 13,178.86 : x
  2. Step 2: Convert to fraction form
    22,612.12/31,208.38 = 13,178.86/x
  3. Step 3: Cross multiply
    22,612.12x = 31,208.38 × 13,178.86
  4. Step 4: Simplify right side
    22,612.12x = 411,290,870.85
  5. Step 5: Solve for x
    x = 411,290,870.85/22,612.12
  6. Step 6: Final answer
    x = 18,188.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.