Home / 15,689.72-21,651.96-8,616.29

Finding the Fourth Proportional to 15,689.72, 21,651.96 and 8,616.29

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Solution

The fourth proportional to 15,689.72, 21,651.96 and 8,616.29 is: 11,890.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,689.72 : 21,651.96 = 8,616.29 : x
  2. Step 2: Convert to fraction form
    15,689.72/21,651.96 = 8,616.29/x
  3. Step 3: Cross multiply
    15,689.72x = 21,651.96 × 8,616.29
  4. Step 4: Simplify right side
    15,689.72x = 186,559,652.87
  5. Step 5: Solve for x
    x = 186,559,652.87/15,689.72
  6. Step 6: Final answer
    x = 11,890.57

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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.