Home / 15,661.46-21,613.84-8,857.20

Finding the Fourth Proportional to 15,661.46, 21,613.84 and 8,857.20

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Solution

The fourth proportional to 15,661.46, 21,613.84 and 8,857.20 is: 12,223.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,661.46 : 21,613.84 = 8,857.20 : x
  2. Step 2: Convert to fraction form
    15,661.46/21,613.84 = 8,857.20/x
  3. Step 3: Cross multiply
    15,661.46x = 21,613.84 × 8,857.20
  4. Step 4: Simplify right side
    15,661.46x = 191,438,103.65
  5. Step 5: Solve for x
    x = 191,438,103.65/15,661.46
  6. Step 6: Final answer
    x = 12,223.52

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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.