Home / 15,690.58-21,653.13-8,616.94

Finding the Fourth Proportional to 15,690.58, 21,653.13 and 8,616.94

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Solution

The fourth proportional to 15,690.58, 21,653.13 and 8,616.94 is: 11,891.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.58 : 21,653.13 = 8,616.94 : x
  2. Step 2: Convert to fraction form
    15,690.58/21,653.13 = 8,616.94/x
  3. Step 3: Cross multiply
    15,690.58x = 21,653.13 × 8,616.94
  4. Step 4: Simplify right side
    15,690.58x = 186,583,722.02
  5. Step 5: Solve for x
    x = 186,583,722.02/15,690.58
  6. Step 6: Final answer
    x = 11,891.45

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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.