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Finding the Fourth Proportional to 13,291.70, 19,918.73 and 7,371.18

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Solution

The fourth proportional to 13,291.70, 19,918.73 and 7,371.18 is: 11,046.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,291.70 : 19,918.73 = 7,371.18 : x
  2. Step 2: Convert to fraction form
    13,291.70/19,918.73 = 7,371.18/x
  3. Step 3: Cross multiply
    13,291.70x = 19,918.73 × 7,371.18
  4. Step 4: Simplify right side
    13,291.70x = 146,824,562.63
  5. Step 5: Solve for x
    x = 146,824,562.63/13,291.70
  6. Step 6: Final answer
    x = 11,046.34

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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.