Home / 13,035.81-19,579.89-7,781.09

Finding the Fourth Proportional to 13,035.81, 19,579.89 and 7,781.09

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Solution

The fourth proportional to 13,035.81, 19,579.89 and 7,781.09 is: 11,687.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,035.81 : 19,579.89 = 7,781.09 : x
  2. Step 2: Convert to fraction form
    13,035.81/19,579.89 = 7,781.09/x
  3. Step 3: Cross multiply
    13,035.81x = 19,579.89 × 7,781.09
  4. Step 4: Simplify right side
    13,035.81x = 152,352,817.56
  5. Step 5: Solve for x
    x = 152,352,817.56/13,035.81
  6. Step 6: Final answer
    x = 11,687.25

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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.