Home / 40,687.36-61,036.81-12,609.79

Finding the Fourth Proportional to 40,687.36, 61,036.81 and 12,609.79

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Solution

The fourth proportional to 40,687.36, 61,036.81 and 12,609.79 is: 18,916.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,687.36 : 61,036.81 = 12,609.79 : x
  2. Step 2: Convert to fraction form
    40,687.36/61,036.81 = 12,609.79/x
  3. Step 3: Cross multiply
    40,687.36x = 61,036.81 × 12,609.79
  4. Step 4: Simplify right side
    40,687.36x = 769,661,172.25
  5. Step 5: Solve for x
    x = 769,661,172.25/40,687.36
  6. Step 6: Final answer
    x = 18,916.47

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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.