Home / 15,764.30-21,755.70-8,690.70

Finding the Fourth Proportional to 15,764.30, 21,755.70 and 8,690.70

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Solution

The fourth proportional to 15,764.30, 21,755.70 and 8,690.70 is: 11,993.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,764.30 : 21,755.70 = 8,690.70 : x
  2. Step 2: Convert to fraction form
    15,764.30/21,755.70 = 8,690.70/x
  3. Step 3: Cross multiply
    15,764.30x = 21,755.70 × 8,690.70
  4. Step 4: Simplify right side
    15,764.30x = 189,072,261.99
  5. Step 5: Solve for x
    x = 189,072,261.99/15,764.30
  6. Step 6: Final answer
    x = 11,993.70

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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.