Home / 10,863.72-14,989.30-6,387.12

Finding the Fourth Proportional to 10,863.72, 14,989.30 and 6,387.12

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Solution

The fourth proportional to 10,863.72, 14,989.30 and 6,387.12 is: 8,812.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,863.72 : 14,989.30 = 6,387.12 : x
  2. Step 2: Convert to fraction form
    10,863.72/14,989.30 = 6,387.12/x
  3. Step 3: Cross multiply
    10,863.72x = 14,989.30 × 6,387.12
  4. Step 4: Simplify right side
    10,863.72x = 95,738,457.82
  5. Step 5: Solve for x
    x = 95,738,457.82/10,863.72
  6. Step 6: Final answer
    x = 8,812.68

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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.