Home / 20,266.10-30,399.15-12,490.10

Finding the Fourth Proportional to 20,266.10, 30,399.15 and 12,490.10

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Solution

The fourth proportional to 20,266.10, 30,399.15 and 12,490.10 is: 18,735.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,266.10 : 30,399.15 = 12,490.10 : x
  2. Step 2: Convert to fraction form
    20,266.10/30,399.15 = 12,490.10/x
  3. Step 3: Cross multiply
    20,266.10x = 30,399.15 × 12,490.10
  4. Step 4: Simplify right side
    20,266.10x = 379,688,423.42
  5. Step 5: Solve for x
    x = 379,688,423.42/20,266.10
  6. Step 6: Final answer
    x = 18,735.15

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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.