Home / 20,453.24-30,683.10-12,139.40

Finding the Fourth Proportional to 20,453.24, 30,683.10 and 12,139.40

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Solution

The fourth proportional to 20,453.24, 30,683.10 and 12,139.40 is: 18,211.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,453.24 : 30,683.10 = 12,139.40 : x
  2. Step 2: Convert to fraction form
    20,453.24/30,683.10 = 12,139.40/x
  3. Step 3: Cross multiply
    20,453.24x = 30,683.10 × 12,139.40
  4. Step 4: Simplify right side
    20,453.24x = 372,474,424.14
  5. Step 5: Solve for x
    x = 372,474,424.14/20,453.24
  6. Step 6: Final answer
    x = 18,211.02

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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.