Home / 12,918.76-19,381.50-3,685.48

Finding the Fourth Proportional to 12,918.76, 19,381.50 and 3,685.48

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Solution

The fourth proportional to 12,918.76, 19,381.50 and 3,685.48 is: 5,529.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.76 : 19,381.50 = 3,685.48 : x
  2. Step 2: Convert to fraction form
    12,918.76/19,381.50 = 3,685.48/x
  3. Step 3: Cross multiply
    12,918.76x = 19,381.50 × 3,685.48
  4. Step 4: Simplify right side
    12,918.76x = 71,430,130.62
  5. Step 5: Solve for x
    x = 71,430,130.62/12,918.76
  6. Step 6: Final answer
    x = 5,529.18

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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.