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Finding the Fourth Proportional to 9,642.80, 14,464.20 and 4,713.20

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Solution

The fourth proportional to 9,642.80, 14,464.20 and 4,713.20 is: 7,069.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,642.80 : 14,464.20 = 4,713.20 : x
  2. Step 2: Convert to fraction form
    9,642.80/14,464.20 = 4,713.20/x
  3. Step 3: Cross multiply
    9,642.80x = 14,464.20 × 4,713.20
  4. Step 4: Simplify right side
    9,642.80x = 68,172,667.44
  5. Step 5: Solve for x
    x = 68,172,667.44/9,642.80
  6. Step 6: Final answer
    x = 7,069.80

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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.