Home / 20,950.12-28,911.68-11,518.70

Finding the Fourth Proportional to 20,950.12, 28,911.68 and 11,518.70

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Solution

The fourth proportional to 20,950.12, 28,911.68 and 11,518.70 is: 15,896.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,950.12 : 28,911.68 = 11,518.70 : x
  2. Step 2: Convert to fraction form
    20,950.12/28,911.68 = 11,518.70/x
  3. Step 3: Cross multiply
    20,950.12x = 28,911.68 × 11,518.70
  4. Step 4: Simplify right side
    20,950.12x = 333,024,968.42
  5. Step 5: Solve for x
    x = 333,024,968.42/20,950.12
  6. Step 6: Final answer
    x = 15,896.09

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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.