Home / 15,579.09-21,499.20-8,505.90

Finding the Fourth Proportional to 15,579.09, 21,499.20 and 8,505.90

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Solution

The fourth proportional to 15,579.09, 21,499.20 and 8,505.90 is: 11,738.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,579.09 : 21,499.20 = 8,505.90 : x
  2. Step 2: Convert to fraction form
    15,579.09/21,499.20 = 8,505.90/x
  3. Step 3: Cross multiply
    15,579.09x = 21,499.20 × 8,505.90
  4. Step 4: Simplify right side
    15,579.09x = 182,870,045.28
  5. Step 5: Solve for x
    x = 182,870,045.28/15,579.09
  6. Step 6: Final answer
    x = 11,738.17

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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.