Home / 15,709.68-21,680.46-8,636.16

Finding the Fourth Proportional to 15,709.68, 21,680.46 and 8,636.16

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Solution

The fourth proportional to 15,709.68, 21,680.46 and 8,636.16 is: 11,918.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.68 : 21,680.46 = 8,636.16 : x
  2. Step 2: Convert to fraction form
    15,709.68/21,680.46 = 8,636.16/x
  3. Step 3: Cross multiply
    15,709.68x = 21,680.46 × 8,636.16
  4. Step 4: Simplify right side
    15,709.68x = 187,235,921.43
  5. Step 5: Solve for x
    x = 187,235,921.43/15,709.68
  6. Step 6: Final answer
    x = 11,918.51

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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.