Home / 20,306.40-28,022.64-11,353.80

Finding the Fourth Proportional to 20,306.40, 28,022.64 and 11,353.80

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Solution

The fourth proportional to 20,306.40, 28,022.64 and 11,353.80 is: 15,668.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,306.40 : 28,022.64 = 11,353.80 : x
  2. Step 2: Convert to fraction form
    20,306.40/28,022.64 = 11,353.80/x
  3. Step 3: Cross multiply
    20,306.40x = 28,022.64 × 11,353.80
  4. Step 4: Simplify right side
    20,306.40x = 318,163,450.03
  5. Step 5: Solve for x
    x = 318,163,450.03/20,306.40
  6. Step 6: Final answer
    x = 15,668.14

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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.