Home / 28,511.11-39,343.73-15,763.55

Finding the Fourth Proportional to 28,511.11, 39,343.73 and 15,763.55

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Solution

The fourth proportional to 28,511.11, 39,343.73 and 15,763.55 is: 21,752.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,511.11 : 39,343.73 = 15,763.55 : x
  2. Step 2: Convert to fraction form
    28,511.11/39,343.73 = 15,763.55/x
  3. Step 3: Cross multiply
    28,511.11x = 39,343.73 × 15,763.55
  4. Step 4: Simplify right side
    28,511.11x = 620,196,697.73
  5. Step 5: Solve for x
    x = 620,196,697.73/28,511.11
  6. Step 6: Final answer
    x = 21,752.81

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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.