Home / 15,710.46-21,680.36-8,636.86

Finding the Fourth Proportional to 15,710.46, 21,680.36 and 8,636.86

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Solution

The fourth proportional to 15,710.46, 21,680.36 and 8,636.86 is: 11,918.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,710.46 : 21,680.36 = 8,636.86 : x
  2. Step 2: Convert to fraction form
    15,710.46/21,680.36 = 8,636.86/x
  3. Step 3: Cross multiply
    15,710.46x = 21,680.36 × 8,636.86
  4. Step 4: Simplify right side
    15,710.46x = 187,250,250.37
  5. Step 5: Solve for x
    x = 187,250,250.37/15,710.46
  6. Step 6: Final answer
    x = 11,918.83

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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.