Home / 20,790.28-28,690.50-11,359

Finding the Fourth Proportional to 20,790.28, 28,690.50 and 11,359

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Solution

The fourth proportional to 20,790.28, 28,690.50 and 11,359 is: 15,675.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.28 : 28,690.50 = 11,359 : x
  2. Step 2: Convert to fraction form
    20,790.28/28,690.50 = 11,359/x
  3. Step 3: Cross multiply
    20,790.28x = 28,690.50 × 11,359
  4. Step 4: Simplify right side
    20,790.28x = 325,895,389.50
  5. Step 5: Solve for x
    x = 325,895,389.50/20,790.28
  6. Step 6: Final answer
    x = 15,675.37

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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.