Home / 20,965.28-31,466.72-18,740.60

Finding the Fourth Proportional to 20,965.28, 31,466.72 and 18,740.60

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Solution

The fourth proportional to 20,965.28, 31,466.72 and 18,740.60 is: 28,127.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,965.28 : 31,466.72 = 18,740.60 : x
  2. Step 2: Convert to fraction form
    20,965.28/31,466.72 = 18,740.60/x
  3. Step 3: Cross multiply
    20,965.28x = 31,466.72 × 18,740.60
  4. Step 4: Simplify right side
    20,965.28x = 589,705,212.83
  5. Step 5: Solve for x
    x = 589,705,212.83/20,965.28
  6. Step 6: Final answer
    x = 28,127.71

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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.