Home / 5,605.20-8,409.62-1,909.78

Finding the Fourth Proportional to 5,605.20, 8,409.62 and 1,909.78

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Solution

The fourth proportional to 5,605.20, 8,409.62 and 1,909.78 is: 2,865.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,605.20 : 8,409.62 = 1,909.78 : x
  2. Step 2: Convert to fraction form
    5,605.20/8,409.62 = 1,909.78/x
  3. Step 3: Cross multiply
    5,605.20x = 8,409.62 × 1,909.78
  4. Step 4: Simplify right side
    5,605.20x = 16,060,507.83
  5. Step 5: Solve for x
    x = 16,060,507.83/5,605.20
  6. Step 6: Final answer
    x = 2,865.29

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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.