Home / 20,836.80-31,190.40-12,045.60

Finding the Fourth Proportional to 20,836.80, 31,190.40 and 12,045.60

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Solution

The fourth proportional to 20,836.80, 31,190.40 and 12,045.60 is: 18,030.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,836.80 : 31,190.40 = 12,045.60 : x
  2. Step 2: Convert to fraction form
    20,836.80/31,190.40 = 12,045.60/x
  3. Step 3: Cross multiply
    20,836.80x = 31,190.40 × 12,045.60
  4. Step 4: Simplify right side
    20,836.80x = 375,707,082.24
  5. Step 5: Solve for x
    x = 375,707,082.24/20,836.80
  6. Step 6: Final answer
    x = 18,030.94

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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.