Home / 15,690.56-21,653.35-8,617.13

Finding the Fourth Proportional to 15,690.56, 21,653.35 and 8,617.13

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Solution

The fourth proportional to 15,690.56, 21,653.35 and 8,617.13 is: 11,891.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.56 : 21,653.35 = 8,617.13 : x
  2. Step 2: Convert to fraction form
    15,690.56/21,653.35 = 8,617.13/x
  3. Step 3: Cross multiply
    15,690.56x = 21,653.35 × 8,617.13
  4. Step 4: Simplify right side
    15,690.56x = 186,589,829.31
  5. Step 5: Solve for x
    x = 186,589,829.31/15,690.56
  6. Step 6: Final answer
    x = 11,891.85

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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.