Home / 15,709.40-21,679.01-8,635.82

Finding the Fourth Proportional to 15,709.40, 21,679.01 and 8,635.82

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Solution

The fourth proportional to 15,709.40, 21,679.01 and 8,635.82 is: 11,917.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.40 : 21,679.01 = 8,635.82 : x
  2. Step 2: Convert to fraction form
    15,709.40/21,679.01 = 8,635.82/x
  3. Step 3: Cross multiply
    15,709.40x = 21,679.01 × 8,635.82
  4. Step 4: Simplify right side
    15,709.40x = 187,215,876.56
  5. Step 5: Solve for x
    x = 187,215,876.56/15,709.40
  6. Step 6: Final answer
    x = 11,917.45

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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.