Home / 9,222.72-12,730.08-6,429.12

Finding the Fourth Proportional to 9,222.72, 12,730.08 and 6,429.12

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Solution

The fourth proportional to 9,222.72, 12,730.08 and 6,429.12 is: 8,874.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,222.72 : 12,730.08 = 6,429.12 : x
  2. Step 2: Convert to fraction form
    9,222.72/12,730.08 = 6,429.12/x
  3. Step 3: Cross multiply
    9,222.72x = 12,730.08 × 6,429.12
  4. Step 4: Simplify right side
    9,222.72x = 81,843,211.93
  5. Step 5: Solve for x
    x = 81,843,211.93/9,222.72
  6. Step 6: Final answer
    x = 8,874.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.