Home / 10,639.35-14,680.26-6,861.78

Finding the Fourth Proportional to 10,639.35, 14,680.26 and 6,861.78

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Solution

The fourth proportional to 10,639.35, 14,680.26 and 6,861.78 is: 9,467.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,639.35 : 14,680.26 = 6,861.78 : x
  2. Step 2: Convert to fraction form
    10,639.35/14,680.26 = 6,861.78/x
  3. Step 3: Cross multiply
    10,639.35x = 14,680.26 × 6,861.78
  4. Step 4: Simplify right side
    10,639.35x = 100,732,714.46
  5. Step 5: Solve for x
    x = 100,732,714.46/10,639.35
  6. Step 6: Final answer
    x = 9,467.94

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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.