Home / 20,880.84-31,317.84-6,840.66

Finding the Fourth Proportional to 20,880.84, 31,317.84 and 6,840.66

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Solution

The fourth proportional to 20,880.84, 31,317.84 and 6,840.66 is: 10,259.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,880.84 : 31,317.84 = 6,840.66 : x
  2. Step 2: Convert to fraction form
    20,880.84/31,317.84 = 6,840.66/x
  3. Step 3: Cross multiply
    20,880.84x = 31,317.84 × 6,840.66
  4. Step 4: Simplify right side
    20,880.84x = 214,234,695.37
  5. Step 5: Solve for x
    x = 214,234,695.37/20,880.84
  6. Step 6: Final answer
    x = 10,259.87

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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.