Home / 20,800.64-28,704.86-11,369.19

Finding the Fourth Proportional to 20,800.64, 28,704.86 and 11,369.19

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Solution

The fourth proportional to 20,800.64, 28,704.86 and 11,369.19 is: 15,689.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,800.64 : 28,704.86 = 11,369.19 : x
  2. Step 2: Convert to fraction form
    20,800.64/28,704.86 = 11,369.19/x
  3. Step 3: Cross multiply
    20,800.64x = 28,704.86 × 11,369.19
  4. Step 4: Simplify right side
    20,800.64x = 326,350,950.42
  5. Step 5: Solve for x
    x = 326,350,950.42/20,800.64
  6. Step 6: Final answer
    x = 15,689.47

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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.