Home / 15,709.20-21,679.01-8,636.07

Finding the Fourth Proportional to 15,709.20, 21,679.01 and 8,636.07

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Solution

The fourth proportional to 15,709.20, 21,679.01 and 8,636.07 is: 11,917.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.20 : 21,679.01 = 8,636.07 : x
  2. Step 2: Convert to fraction form
    15,709.20/21,679.01 = 8,636.07/x
  3. Step 3: Cross multiply
    15,709.20x = 21,679.01 × 8,636.07
  4. Step 4: Simplify right side
    15,709.20x = 187,221,447.89
  5. Step 5: Solve for x
    x = 187,221,447.89/15,709.20
  6. Step 6: Final answer
    x = 11,917.95

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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.