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Finding the Fourth Proportional to 6,520.40, 8,998.80 and 4,003.76

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Solution

The fourth proportional to 6,520.40, 8,998.80 and 4,003.76 is: 5,525.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,520.40 : 8,998.80 = 4,003.76 : x
  2. Step 2: Convert to fraction form
    6,520.40/8,998.80 = 4,003.76/x
  3. Step 3: Cross multiply
    6,520.40x = 8,998.80 × 4,003.76
  4. Step 4: Simplify right side
    6,520.40x = 36,029,035.49
  5. Step 5: Solve for x
    x = 36,029,035.49/6,520.40
  6. Step 6: Final answer
    x = 5,525.59

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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.