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Finding the Fourth Proportional to 8,865.80, 12,235.34 and 4,886.90

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Solution

The fourth proportional to 8,865.80, 12,235.34 and 4,886.90 is: 6,744.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,865.80 : 12,235.34 = 4,886.90 : x
  2. Step 2: Convert to fraction form
    8,865.80/12,235.34 = 4,886.90/x
  3. Step 3: Cross multiply
    8,865.80x = 12,235.34 × 4,886.90
  4. Step 4: Simplify right side
    8,865.80x = 59,792,797.43
  5. Step 5: Solve for x
    x = 59,792,797.43/8,865.80
  6. Step 6: Final answer
    x = 6,744.21

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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.