Home / 20,124.18-30,189.51-8,438.58

Finding the Fourth Proportional to 20,124.18, 30,189.51 and 8,438.58

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Solution

The fourth proportional to 20,124.18, 30,189.51 and 8,438.58 is: 12,659.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,124.18 : 30,189.51 = 8,438.58 : x
  2. Step 2: Convert to fraction form
    20,124.18/30,189.51 = 8,438.58/x
  3. Step 3: Cross multiply
    20,124.18x = 30,189.51 × 8,438.58
  4. Step 4: Simplify right side
    20,124.18x = 254,756,595.30
  5. Step 5: Solve for x
    x = 254,756,595.30/20,124.18
  6. Step 6: Final answer
    x = 12,659.23

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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.