Home / 15,690.18-21,651.18-8,616.96

Finding the Fourth Proportional to 15,690.18, 21,651.18 and 8,616.96

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Solution

The fourth proportional to 15,690.18, 21,651.18 and 8,616.96 is: 11,890.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.18 : 21,651.18 = 8,616.96 : x
  2. Step 2: Convert to fraction form
    15,690.18/21,651.18 = 8,616.96/x
  3. Step 3: Cross multiply
    15,690.18x = 21,651.18 × 8,616.96
  4. Step 4: Simplify right side
    15,690.18x = 186,567,352.01
  5. Step 5: Solve for x
    x = 186,567,352.01/15,690.18
  6. Step 6: Final answer
    x = 11,890.71

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1.5x scale

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.