Home / 6,455.40-8,909.12-3,623.20

Finding the Fourth Proportional to 6,455.40, 8,909.12 and 3,623.20

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Solution

The fourth proportional to 6,455.40, 8,909.12 and 3,623.20 is: 5,000.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,455.40 : 8,909.12 = 3,623.20 : x
  2. Step 2: Convert to fraction form
    6,455.40/8,909.12 = 3,623.20/x
  3. Step 3: Cross multiply
    6,455.40x = 8,909.12 × 3,623.20
  4. Step 4: Simplify right side
    6,455.40x = 32,279,523.58
  5. Step 5: Solve for x
    x = 32,279,523.58/6,455.40
  6. Step 6: Final answer
    x = 5,000.39

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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.