Home / 20,912.04-28,884.60-15,630.84

Finding the Fourth Proportional to 20,912.04, 28,884.60 and 15,630.84

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Solution

The fourth proportional to 20,912.04, 28,884.60 and 15,630.84 is: 21,589.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,912.04 : 28,884.60 = 15,630.84 : x
  2. Step 2: Convert to fraction form
    20,912.04/28,884.60 = 15,630.84/x
  3. Step 3: Cross multiply
    20,912.04x = 28,884.60 × 15,630.84
  4. Step 4: Simplify right side
    20,912.04x = 451,490,561.06
  5. Step 5: Solve for x
    x = 451,490,561.06/20,912.04
  6. Step 6: Final answer
    x = 21,589.98

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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.