Home / 13,920.19-19,211.07-7,633.78

Finding the Fourth Proportional to 13,920.19, 19,211.07 and 7,633.78

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Solution

The fourth proportional to 13,920.19, 19,211.07 and 7,633.78 is: 10,535.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,920.19 : 19,211.07 = 7,633.78 : x
  2. Step 2: Convert to fraction form
    13,920.19/19,211.07 = 7,633.78/x
  3. Step 3: Cross multiply
    13,920.19x = 19,211.07 × 7,633.78
  4. Step 4: Simplify right side
    13,920.19x = 146,653,062.54
  5. Step 5: Solve for x
    x = 146,653,062.54/13,920.19
  6. Step 6: Final answer
    x = 10,535.28

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.