Home / 13,998.81-19,318.36-7,711.19

Finding the Fourth Proportional to 13,998.81, 19,318.36 and 7,711.19

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Solution

The fourth proportional to 13,998.81, 19,318.36 and 7,711.19 is: 10,641.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.81 : 19,318.36 = 7,711.19 : x
  2. Step 2: Convert to fraction form
    13,998.81/19,318.36 = 7,711.19/x
  3. Step 3: Cross multiply
    13,998.81x = 19,318.36 × 7,711.19
  4. Step 4: Simplify right side
    13,998.81x = 148,967,544.45
  5. Step 5: Solve for x
    x = 148,967,544.45/13,998.81
  6. Step 6: Final answer
    x = 10,641.44

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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.