Home / 12,420.23-18,626.40-4,098.70

Finding the Fourth Proportional to 12,420.23, 18,626.40 and 4,098.70

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Solution

The fourth proportional to 12,420.23, 18,626.40 and 4,098.70 is: 6,146.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,420.23 : 18,626.40 = 4,098.70 : x
  2. Step 2: Convert to fraction form
    12,420.23/18,626.40 = 4,098.70/x
  3. Step 3: Cross multiply
    12,420.23x = 18,626.40 × 4,098.70
  4. Step 4: Simplify right side
    12,420.23x = 76,343,912.05
  5. Step 5: Solve for x
    x = 76,343,912.05/12,420.23
  6. Step 6: Final answer
    x = 6,146.74

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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.