Home / 6,921.20-10,381.80-4,156.40

Finding the Fourth Proportional to 6,921.20, 10,381.80 and 4,156.40

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Solution

The fourth proportional to 6,921.20, 10,381.80 and 4,156.40 is: 6,234.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,921.20 : 10,381.80 = 4,156.40 : x
  2. Step 2: Convert to fraction form
    6,921.20/10,381.80 = 4,156.40/x
  3. Step 3: Cross multiply
    6,921.20x = 10,381.80 × 4,156.40
  4. Step 4: Simplify right side
    6,921.20x = 43,150,913.52
  5. Step 5: Solve for x
    x = 43,150,913.52/6,921.20
  6. Step 6: Final answer
    x = 6,234.60

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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.