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Finding the Fourth Proportional to 13,998.72, 19,317.44 and 7,710.72

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Solution

The fourth proportional to 13,998.72, 19,317.44 and 7,710.72 is: 10,640.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,998.72 : 19,317.44 = 7,710.72 : x
  2. Step 2: Convert to fraction form
    13,998.72/19,317.44 = 7,710.72/x
  3. Step 3: Cross multiply
    13,998.72x = 19,317.44 × 7,710.72
  4. Step 4: Simplify right side
    13,998.72x = 148,951,370.96
  5. Step 5: Solve for x
    x = 148,951,370.96/13,998.72
  6. Step 6: Final answer
    x = 10,640.36

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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.