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Finding the Fourth Proportional to 5,669.20, 8,545.90 and 5,285.20

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Solution

The fourth proportional to 5,669.20, 8,545.90 and 5,285.20 is: 7,967.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,669.20 : 8,545.90 = 5,285.20 : x
  2. Step 2: Convert to fraction form
    5,669.20/8,545.90 = 5,285.20/x
  3. Step 3: Cross multiply
    5,669.20x = 8,545.90 × 5,285.20
  4. Step 4: Simplify right side
    5,669.20x = 45,166,790.68
  5. Step 5: Solve for x
    x = 45,166,790.68/5,669.20
  6. Step 6: Final answer
    x = 7,967.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.