Home / 12,418.11-17,139.69-7,642.17

Finding the Fourth Proportional to 12,418.11, 17,139.69 and 7,642.17

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Solution

The fourth proportional to 12,418.11, 17,139.69 and 7,642.17 is: 10,547.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,418.11 : 17,139.69 = 7,642.17 : x
  2. Step 2: Convert to fraction form
    12,418.11/17,139.69 = 7,642.17/x
  3. Step 3: Cross multiply
    12,418.11x = 17,139.69 × 7,642.17
  4. Step 4: Simplify right side
    12,418.11x = 130,984,424.73
  5. Step 5: Solve for x
    x = 130,984,424.73/12,418.11
  6. Step 6: Final answer
    x = 10,547.86

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.