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Finding the Fourth Proportional to 8,865, 12,234.92 and 5,720.58

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Solution

The fourth proportional to 8,865, 12,234.92 and 5,720.58 is: 7,895.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,865 : 12,234.92 = 5,720.58 : x
  2. Step 2: Convert to fraction form
    8,865/12,234.92 = 5,720.58/x
  3. Step 3: Cross multiply
    8,865x = 12,234.92 × 5,720.58
  4. Step 4: Simplify right side
    8,865x = 69,990,810.05
  5. Step 5: Solve for x
    x = 69,990,810.05/8,865
  6. Step 6: Final answer
    x = 7,895.18

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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.