Home / 8,555.20-12,840.90-5,274.70

Finding the Fourth Proportional to 8,555.20, 12,840.90 and 5,274.70

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Solution

The fourth proportional to 8,555.20, 12,840.90 and 5,274.70 is: 7,917.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,555.20 : 12,840.90 = 5,274.70 : x
  2. Step 2: Convert to fraction form
    8,555.20/12,840.90 = 5,274.70/x
  3. Step 3: Cross multiply
    8,555.20x = 12,840.90 × 5,274.70
  4. Step 4: Simplify right side
    8,555.20x = 67,731,895.23
  5. Step 5: Solve for x
    x = 67,731,895.23/8,555.20
  6. Step 6: Final answer
    x = 7,917.04

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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.