Home / 15,709.55-21,679.58-8,636.15

Finding the Fourth Proportional to 15,709.55, 21,679.58 and 8,636.15

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Solution

The fourth proportional to 15,709.55, 21,679.58 and 8,636.15 is: 11,918.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,709.55 : 21,679.58 = 8,636.15 : x
  2. Step 2: Convert to fraction form
    15,709.55/21,679.58 = 8,636.15/x
  3. Step 3: Cross multiply
    15,709.55x = 21,679.58 × 8,636.15
  4. Step 4: Simplify right side
    15,709.55x = 187,228,180.61
  5. Step 5: Solve for x
    x = 187,228,180.61/15,709.55
  6. Step 6: Final answer
    x = 11,918.12

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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.