Home / 12,138.93-18,212.76-4,748.70

Finding the Fourth Proportional to 12,138.93, 18,212.76 and 4,748.70

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Solution

The fourth proportional to 12,138.93, 18,212.76 and 4,748.70 is: 7,124.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.93 : 18,212.76 = 4,748.70 : x
  2. Step 2: Convert to fraction form
    12,138.93/18,212.76 = 4,748.70/x
  3. Step 3: Cross multiply
    12,138.93x = 18,212.76 × 4,748.70
  4. Step 4: Simplify right side
    12,138.93x = 86,486,933.41
  5. Step 5: Solve for x
    x = 86,486,933.41/12,138.93
  6. Step 6: Final answer
    x = 7,124.76

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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.