Home / 10,664.42-15,989.76-4,428.72

Finding the Fourth Proportional to 10,664.42, 15,989.76 and 4,428.72

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Solution

The fourth proportional to 10,664.42, 15,989.76 and 4,428.72 is: 6,640.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,664.42 : 15,989.76 = 4,428.72 : x
  2. Step 2: Convert to fraction form
    10,664.42/15,989.76 = 4,428.72/x
  3. Step 3: Cross multiply
    10,664.42x = 15,989.76 × 4,428.72
  4. Step 4: Simplify right side
    10,664.42x = 70,814,169.91
  5. Step 5: Solve for x
    x = 70,814,169.91/10,664.42
  6. Step 6: Final answer
    x = 6,640.23

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.