Home / 6,385.78-8,812.45-3,553.21

Finding the Fourth Proportional to 6,385.78, 8,812.45 and 3,553.21

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Solution

The fourth proportional to 6,385.78, 8,812.45 and 3,553.21 is: 4,903.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,385.78 : 8,812.45 = 3,553.21 : x
  2. Step 2: Convert to fraction form
    6,385.78/8,812.45 = 3,553.21/x
  3. Step 3: Cross multiply
    6,385.78x = 8,812.45 × 3,553.21
  4. Step 4: Simplify right side
    6,385.78x = 31,312,485.46
  5. Step 5: Solve for x
    x = 31,312,485.46/6,385.78
  6. Step 6: Final answer
    x = 4,903.47

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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.