Home / 20,930.02-28,902.18-15,615.62

Finding the Fourth Proportional to 20,930.02, 28,902.18 and 15,615.62

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Solution

The fourth proportional to 20,930.02, 28,902.18 and 15,615.62 is: 21,563.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,930.02 : 28,902.18 = 15,615.62 : x
  2. Step 2: Convert to fraction form
    20,930.02/28,902.18 = 15,615.62/x
  3. Step 3: Cross multiply
    20,930.02x = 28,902.18 × 15,615.62
  4. Step 4: Simplify right side
    20,930.02x = 451,325,460.05
  5. Step 5: Solve for x
    x = 451,325,460.05/20,930.02
  6. Step 6: Final answer
    x = 21,563.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.