Home / 20,128.40-30,160.20-16,823.60

Finding the Fourth Proportional to 20,128.40, 30,160.20 and 16,823.60

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Solution

The fourth proportional to 20,128.40, 30,160.20 and 16,823.60 is: 25,208.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,128.40 : 30,160.20 = 16,823.60 : x
  2. Step 2: Convert to fraction form
    20,128.40/30,160.20 = 16,823.60/x
  3. Step 3: Cross multiply
    20,128.40x = 30,160.20 × 16,823.60
  4. Step 4: Simplify right side
    20,128.40x = 507,403,140.72
  5. Step 5: Solve for x
    x = 507,403,140.72/20,128.40
  6. Step 6: Final answer
    x = 25,208.32

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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.