Home / 8,490.42-12,730.77-3,555.90

Finding the Fourth Proportional to 8,490.42, 12,730.77 and 3,555.90

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Solution

The fourth proportional to 8,490.42, 12,730.77 and 3,555.90 is: 5,331.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,490.42 : 12,730.77 = 3,555.90 : x
  2. Step 2: Convert to fraction form
    8,490.42/12,730.77 = 3,555.90/x
  3. Step 3: Cross multiply
    8,490.42x = 12,730.77 × 3,555.90
  4. Step 4: Simplify right side
    8,490.42x = 45,269,345.04
  5. Step 5: Solve for x
    x = 45,269,345.04/8,490.42
  6. Step 6: Final answer
    x = 5,331.81

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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.