Home / 20,127.58-30,194.10-8,438.06

Finding the Fourth Proportional to 20,127.58, 30,194.10 and 8,438.06

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Solution

The fourth proportional to 20,127.58, 30,194.10 and 8,438.06 is: 12,658.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,127.58 : 30,194.10 = 8,438.06 : x
  2. Step 2: Convert to fraction form
    20,127.58/30,194.10 = 8,438.06/x
  3. Step 3: Cross multiply
    20,127.58x = 30,194.10 × 8,438.06
  4. Step 4: Simplify right side
    20,127.58x = 254,779,627.45
  5. Step 5: Solve for x
    x = 254,779,627.45/20,127.58
  6. Step 6: Final answer
    x = 12,658.23

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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.