Home / 20,114.40-30,157.20-8,421.60

Finding the Fourth Proportional to 20,114.40, 30,157.20 and 8,421.60

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Solution

The fourth proportional to 20,114.40, 30,157.20 and 8,421.60 is: 12,626.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,114.40 : 30,157.20 = 8,421.60 : x
  2. Step 2: Convert to fraction form
    20,114.40/30,157.20 = 8,421.60/x
  3. Step 3: Cross multiply
    20,114.40x = 30,157.20 × 8,421.60
  4. Step 4: Simplify right side
    20,114.40x = 253,971,875.52
  5. Step 5: Solve for x
    x = 253,971,875.52/20,114.40
  6. Step 6: Final answer
    x = 12,626.37

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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.