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Finding the Fourth Proportional to 12,392.80, 18,656.86 and 11,304.16

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Solution

The fourth proportional to 12,392.80, 18,656.86 and 11,304.16 is: 17,017.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,392.80 : 18,656.86 = 11,304.16 : x
  2. Step 2: Convert to fraction form
    12,392.80/18,656.86 = 11,304.16/x
  3. Step 3: Cross multiply
    12,392.80x = 18,656.86 × 11,304.16
  4. Step 4: Simplify right side
    12,392.80x = 210,900,130.54
  5. Step 5: Solve for x
    x = 210,900,130.54/12,392.80
  6. Step 6: Final answer
    x = 17,017.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.