Home / 12,631.36-18,949.10-5,613.79

Finding the Fourth Proportional to 12,631.36, 18,949.10 and 5,613.79

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Solution

The fourth proportional to 12,631.36, 18,949.10 and 5,613.79 is: 8,421.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,631.36 : 18,949.10 = 5,613.79 : x
  2. Step 2: Convert to fraction form
    12,631.36/18,949.10 = 5,613.79/x
  3. Step 3: Cross multiply
    12,631.36x = 18,949.10 × 5,613.79
  4. Step 4: Simplify right side
    12,631.36x = 106,376,192.65
  5. Step 5: Solve for x
    x = 106,376,192.65/12,631.36
  6. Step 6: Final answer
    x = 8,421.60

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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.