Home / 7,939.40-11,909.10-4,440.20

Finding the Fourth Proportional to 7,939.40, 11,909.10 and 4,440.20

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Solution

The fourth proportional to 7,939.40, 11,909.10 and 4,440.20 is: 6,660.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,939.40 : 11,909.10 = 4,440.20 : x
  2. Step 2: Convert to fraction form
    7,939.40/11,909.10 = 4,440.20/x
  3. Step 3: Cross multiply
    7,939.40x = 11,909.10 × 4,440.20
  4. Step 4: Simplify right side
    7,939.40x = 52,878,785.82
  5. Step 5: Solve for x
    x = 52,878,785.82/7,939.40
  6. Step 6: Final answer
    x = 6,660.30

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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.