Home / 8,429.54-12,640.40-4,920.56

Finding the Fourth Proportional to 8,429.54, 12,640.40 and 4,920.56

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Solution

The fourth proportional to 8,429.54, 12,640.40 and 4,920.56 is: 7,378.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,429.54 : 12,640.40 = 4,920.56 : x
  2. Step 2: Convert to fraction form
    8,429.54/12,640.40 = 4,920.56/x
  3. Step 3: Cross multiply
    8,429.54x = 12,640.40 × 4,920.56
  4. Step 4: Simplify right side
    8,429.54x = 62,197,846.62
  5. Step 5: Solve for x
    x = 62,197,846.62/8,429.54
  6. Step 6: Final answer
    x = 7,378.56

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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.