Home / 15,690.98-21,653.62-8,976.68

Finding the Fourth Proportional to 15,690.98, 21,653.62 and 8,976.68

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Solution

The fourth proportional to 15,690.98, 21,653.62 and 8,976.68 is: 12,387.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,690.98 : 21,653.62 = 8,976.68 : x
  2. Step 2: Convert to fraction form
    15,690.98/21,653.62 = 8,976.68/x
  3. Step 3: Cross multiply
    15,690.98x = 21,653.62 × 8,976.68
  4. Step 4: Simplify right side
    15,690.98x = 194,377,617.58
  5. Step 5: Solve for x
    x = 194,377,617.58/15,690.98
  6. Step 6: Final answer
    x = 12,387.86

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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.