Home / 6,429.66-8,870.96-4,190.72

Finding the Fourth Proportional to 6,429.66, 8,870.96 and 4,190.72

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Solution

The fourth proportional to 6,429.66, 8,870.96 and 4,190.72 is: 5,781.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,429.66 : 8,870.96 = 4,190.72 : x
  2. Step 2: Convert to fraction form
    6,429.66/8,870.96 = 4,190.72/x
  3. Step 3: Cross multiply
    6,429.66x = 8,870.96 × 4,190.72
  4. Step 4: Simplify right side
    6,429.66x = 37,175,644.18
  5. Step 5: Solve for x
    x = 37,175,644.18/6,429.66
  6. Step 6: Final answer
    x = 5,781.90

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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.