Home / 8,555.20-12,828.48-5,429.76

Finding the Fourth Proportional to 8,555.20, 12,828.48 and 5,429.76

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Solution

The fourth proportional to 8,555.20, 12,828.48 and 5,429.76 is: 8,141.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,555.20 : 12,828.48 = 5,429.76 : x
  2. Step 2: Convert to fraction form
    8,555.20/12,828.48 = 5,429.76/x
  3. Step 3: Cross multiply
    8,555.20x = 12,828.48 × 5,429.76
  4. Step 4: Simplify right side
    8,555.20x = 69,655,567.56
  5. Step 5: Solve for x
    x = 69,655,567.56/8,555.20
  6. Step 6: Final answer
    x = 8,141.90

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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.