Home / 12,918.24-19,374-6,343.20

Finding the Fourth Proportional to 12,918.24, 19,374 and 6,343.20

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Solution

The fourth proportional to 12,918.24, 19,374 and 6,343.20 is: 9,513.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,918.24 : 19,374 = 6,343.20 : x
  2. Step 2: Convert to fraction form
    12,918.24/19,374 = 6,343.20/x
  3. Step 3: Cross multiply
    12,918.24x = 19,374 × 6,343.20
  4. Step 4: Simplify right side
    12,918.24x = 122,893,156.80
  5. Step 5: Solve for x
    x = 122,893,156.80/12,918.24
  6. Step 6: Final answer
    x = 9,513.15

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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.