Home / 8,439.40-11,650.34-6,291.32

Finding the Fourth Proportional to 8,439.40, 11,650.34 and 6,291.32

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Solution

The fourth proportional to 8,439.40, 11,650.34 and 6,291.32 is: 8,684.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,439.40 : 11,650.34 = 6,291.32 : x
  2. Step 2: Convert to fraction form
    8,439.40/11,650.34 = 6,291.32/x
  3. Step 3: Cross multiply
    8,439.40x = 11,650.34 × 6,291.32
  4. Step 4: Simplify right side
    8,439.40x = 73,296,017.05
  5. Step 5: Solve for x
    x = 73,296,017.05/8,439.40
  6. Step 6: Final answer
    x = 8,684.98

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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.