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Finding the Fourth Proportional to 12,728.62, 17,574.24 and 9,739.24

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Solution

The fourth proportional to 12,728.62, 17,574.24 and 9,739.24 is: 13,446.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,728.62 : 17,574.24 = 9,739.24 : x
  2. Step 2: Convert to fraction form
    12,728.62/17,574.24 = 9,739.24/x
  3. Step 3: Cross multiply
    12,728.62x = 17,574.24 × 9,739.24
  4. Step 4: Simplify right side
    12,728.62x = 171,159,741.18
  5. Step 5: Solve for x
    x = 171,159,741.18/12,728.62
  6. Step 6: Final answer
    x = 13,446.84

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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.