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Finding the Fourth Proportional to 12,479.20, 18,597.16 and 12,119.35

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Solution

The fourth proportional to 12,479.20, 18,597.16 and 12,119.35 is: 18,060.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,479.20 : 18,597.16 = 12,119.35 : x
  2. Step 2: Convert to fraction form
    12,479.20/18,597.16 = 12,119.35/x
  3. Step 3: Cross multiply
    12,479.20x = 18,597.16 × 12,119.35
  4. Step 4: Simplify right side
    12,479.20x = 225,385,443.51
  5. Step 5: Solve for x
    x = 225,385,443.51/12,479.20
  6. Step 6: Final answer
    x = 18,060.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.