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Finding the Fourth Proportional to 9,171.88, 12,657 and 4,980.14

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Solution

The fourth proportional to 9,171.88, 12,657 and 4,980.14 is: 6,872.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,171.88 : 12,657 = 4,980.14 : x
  2. Step 2: Convert to fraction form
    9,171.88/12,657 = 4,980.14/x
  3. Step 3: Cross multiply
    9,171.88x = 12,657 × 4,980.14
  4. Step 4: Simplify right side
    9,171.88x = 63,033,631.98
  5. Step 5: Solve for x
    x = 63,033,631.98/9,171.88
  6. Step 6: Final answer
    x = 6,872.49

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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.