Home / 12,419.20-18,621.12-4,211.84

Finding the Fourth Proportional to 12,419.20, 18,621.12 and 4,211.84

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Solution

The fourth proportional to 12,419.20, 18,621.12 and 4,211.84 is: 6,315.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,419.20 : 18,621.12 = 4,211.84 : x
  2. Step 2: Convert to fraction form
    12,419.20/18,621.12 = 4,211.84/x
  3. Step 3: Cross multiply
    12,419.20x = 18,621.12 × 4,211.84
  4. Step 4: Simplify right side
    12,419.20x = 78,429,178.06
  5. Step 5: Solve for x
    x = 78,429,178.06/12,419.20
  6. Step 6: Final answer
    x = 6,315.16

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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.