Home / 20,125.40-30,155.70-16,820.60

Finding the Fourth Proportional to 20,125.40, 30,155.70 and 16,820.60

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Solution

The fourth proportional to 20,125.40, 30,155.70 and 16,820.60 is: 25,203.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,125.40 : 30,155.70 = 16,820.60 : x
  2. Step 2: Convert to fraction form
    20,125.40/30,155.70 = 16,820.60/x
  3. Step 3: Cross multiply
    20,125.40x = 30,155.70 × 16,820.60
  4. Step 4: Simplify right side
    20,125.40x = 507,236,967.42
  5. Step 5: Solve for x
    x = 507,236,967.42/20,125.40
  6. Step 6: Final answer
    x = 25,203.82

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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.