Home / 15,709.65-21,679.34-8,636.07

Finding the Fourth Proportional to 15,709.65, 21,679.34 and 8,636.07

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Solution

The fourth proportional to 15,709.65, 21,679.34 and 8,636.07 is: 11,917.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.65 : 21,679.34 = 8,636.07 : x
  2. Step 2: Convert to fraction form
    15,709.65/21,679.34 = 8,636.07/x
  3. Step 3: Cross multiply
    15,709.65x = 21,679.34 × 8,636.07
  4. Step 4: Simplify right side
    15,709.65x = 187,224,297.79
  5. Step 5: Solve for x
    x = 187,224,297.79/15,709.65
  6. Step 6: Final answer
    x = 11,917.79

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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.