Home / 20,124.70-30,190.65-8,439.10

Finding the Fourth Proportional to 20,124.70, 30,190.65 and 8,439.10

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Solution

The fourth proportional to 20,124.70, 30,190.65 and 8,439.10 is: 12,660.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,124.70 : 30,190.65 = 8,439.10 : x
  2. Step 2: Convert to fraction form
    20,124.70/30,190.65 = 8,439.10/x
  3. Step 3: Cross multiply
    20,124.70x = 30,190.65 × 8,439.10
  4. Step 4: Simplify right side
    20,124.70x = 254,781,914.42
  5. Step 5: Solve for x
    x = 254,781,914.42/20,124.70
  6. Step 6: Final answer
    x = 12,660.16

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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.