Home / 8,429.03-12,639.63-4,920.05

Finding the Fourth Proportional to 8,429.03, 12,639.63 and 4,920.05

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Solution

The fourth proportional to 8,429.03, 12,639.63 and 4,920.05 is: 7,377.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,429.03 : 12,639.63 = 4,920.05 : x
  2. Step 2: Convert to fraction form
    8,429.03/12,639.63 = 4,920.05/x
  3. Step 3: Cross multiply
    8,429.03x = 12,639.63 × 4,920.05
  4. Step 4: Simplify right side
    8,429.03x = 62,187,548.38
  5. Step 5: Solve for x
    x = 62,187,548.38/8,429.03
  6. Step 6: Final answer
    x = 7,377.79

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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.