Home / 8,429.93-12,620.40-4,909.20

Finding the Fourth Proportional to 8,429.93, 12,620.40 and 4,909.20

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Solution

The fourth proportional to 8,429.93, 12,620.40 and 4,909.20 is: 7,349.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,429.93 : 12,620.40 = 4,909.20 : x
  2. Step 2: Convert to fraction form
    8,429.93/12,620.40 = 4,909.20/x
  3. Step 3: Cross multiply
    8,429.93x = 12,620.40 × 4,909.20
  4. Step 4: Simplify right side
    8,429.93x = 61,956,067.68
  5. Step 5: Solve for x
    x = 61,956,067.68/8,429.93
  6. Step 6: Final answer
    x = 7,349.54

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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.