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Finding the Fourth Proportional to 12,907.80, 19,361.70 and 9,797.40

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Solution

The fourth proportional to 12,907.80, 19,361.70 and 9,797.40 is: 14,696.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,907.80 : 19,361.70 = 9,797.40 : x
  2. Step 2: Convert to fraction form
    12,907.80/19,361.70 = 9,797.40/x
  3. Step 3: Cross multiply
    12,907.80x = 19,361.70 × 9,797.40
  4. Step 4: Simplify right side
    12,907.80x = 189,694,319.58
  5. Step 5: Solve for x
    x = 189,694,319.58/12,907.80
  6. Step 6: Final answer
    x = 14,696.10

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.