Home / 15,690.30-21,652.61-8,617.15

Finding the Fourth Proportional to 15,690.30, 21,652.61 and 8,617.15

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Solution

The fourth proportional to 15,690.30, 21,652.61 and 8,617.15 is: 11,891.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.30 : 21,652.61 = 8,617.15 : x
  2. Step 2: Convert to fraction form
    15,690.30/21,652.61 = 8,617.15/x
  3. Step 3: Cross multiply
    15,690.30x = 21,652.61 × 8,617.15
  4. Step 4: Simplify right side
    15,690.30x = 186,583,788.26
  5. Step 5: Solve for x
    x = 186,583,788.26/15,690.30
  6. Step 6: Final answer
    x = 11,891.66

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Why These Related Problems?

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