Home / 8,156.40-11,257.88-4,621.72

Finding the Fourth Proportional to 8,156.40, 11,257.88 and 4,621.72

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Solution

The fourth proportional to 8,156.40, 11,257.88 and 4,621.72 is: 6,379.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,156.40 : 11,257.88 = 4,621.72 : x
  2. Step 2: Convert to fraction form
    8,156.40/11,257.88 = 4,621.72/x
  3. Step 3: Cross multiply
    8,156.40x = 11,257.88 × 4,621.72
  4. Step 4: Simplify right side
    8,156.40x = 52,030,769.15
  5. Step 5: Solve for x
    x = 52,030,769.15/8,156.40
  6. Step 6: Final answer
    x = 6,379.13

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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.