Home / 12,647.61-18,971.35-3,287.66

Finding the Fourth Proportional to 12,647.61, 18,971.35 and 3,287.66

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Solution

The fourth proportional to 12,647.61, 18,971.35 and 3,287.66 is: 4,931.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,647.61 : 18,971.35 = 3,287.66 : x
  2. Step 2: Convert to fraction form
    12,647.61/18,971.35 = 3,287.66/x
  3. Step 3: Cross multiply
    12,647.61x = 18,971.35 × 3,287.66
  4. Step 4: Simplify right side
    12,647.61x = 62,371,245.47
  5. Step 5: Solve for x
    x = 62,371,245.47/12,647.61
  6. Step 6: Final answer
    x = 4,931.46

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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.