Home / 12,918.32-19,381.26-6,681.88

Finding the Fourth Proportional to 12,918.32, 19,381.26 and 6,681.88

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Solution

The fourth proportional to 12,918.32, 19,381.26 and 6,681.88 is: 10,024.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.32 : 19,381.26 = 6,681.88 : x
  2. Step 2: Convert to fraction form
    12,918.32/19,381.26 = 6,681.88/x
  3. Step 3: Cross multiply
    12,918.32x = 19,381.26 × 6,681.88
  4. Step 4: Simplify right side
    12,918.32x = 129,503,253.57
  5. Step 5: Solve for x
    x = 129,503,253.57/12,918.32
  6. Step 6: Final answer
    x = 10,024.78

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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.