Home / 12,458.07-18,685.17-4,138.20

Finding the Fourth Proportional to 12,458.07, 18,685.17 and 4,138.20

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Solution

The fourth proportional to 12,458.07, 18,685.17 and 4,138.20 is: 6,206.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,458.07 : 18,685.17 = 4,138.20 : x
  2. Step 2: Convert to fraction form
    12,458.07/18,685.17 = 4,138.20/x
  3. Step 3: Cross multiply
    12,458.07x = 18,685.17 × 4,138.20
  4. Step 4: Simplify right side
    12,458.07x = 77,322,970.49
  5. Step 5: Solve for x
    x = 77,322,970.49/12,458.07
  6. Step 6: Final answer
    x = 6,206.66

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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.