Home / 12,738.10-19,107.15-9,785.65

Finding the Fourth Proportional to 12,738.10, 19,107.15 and 9,785.65

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Solution

The fourth proportional to 12,738.10, 19,107.15 and 9,785.65 is: 14,678.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,738.10 : 19,107.15 = 9,785.65 : x
  2. Step 2: Convert to fraction form
    12,738.10/19,107.15 = 9,785.65/x
  3. Step 3: Cross multiply
    12,738.10x = 19,107.15 × 9,785.65
  4. Step 4: Simplify right side
    12,738.10x = 186,975,882.40
  5. Step 5: Solve for x
    x = 186,975,882.40/12,738.10
  6. Step 6: Final answer
    x = 14,678.48

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Double scale
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Similar ratio
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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.