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Finding the Fourth Proportional to 8,957.57, 12,361.19 and 4,978.58

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Solution

The fourth proportional to 8,957.57, 12,361.19 and 4,978.58 is: 6,870.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,957.57 : 12,361.19 = 4,978.58 : x
  2. Step 2: Convert to fraction form
    8,957.57/12,361.19 = 4,978.58/x
  3. Step 3: Cross multiply
    8,957.57x = 12,361.19 × 4,978.58
  4. Step 4: Simplify right side
    8,957.57x = 61,541,086.61
  5. Step 5: Solve for x
    x = 61,541,086.61/8,957.57
  6. Step 6: Final answer
    x = 6,870.29

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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.