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Finding the Fourth Proportional to 8,957.30, 12,361.85 and 4,979.18

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Solution

The fourth proportional to 8,957.30, 12,361.85 and 4,979.18 is: 6,871.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,957.30 : 12,361.85 = 4,979.18 : x
  2. Step 2: Convert to fraction form
    8,957.30/12,361.85 = 4,979.18/x
  3. Step 3: Cross multiply
    8,957.30x = 12,361.85 × 4,979.18
  4. Step 4: Simplify right side
    8,957.30x = 61,551,907.84
  5. Step 5: Solve for x
    x = 61,551,907.84/8,957.30
  6. Step 6: Final answer
    x = 6,871.70

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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.