Home / 20,942.93-28,900.45-11,991.27

Finding the Fourth Proportional to 20,942.93, 28,900.45 and 11,991.27

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Solution

The fourth proportional to 20,942.93, 28,900.45 and 11,991.27 is: 16,547.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,942.93 : 28,900.45 = 11,991.27 : x
  2. Step 2: Convert to fraction form
    20,942.93/28,900.45 = 11,991.27/x
  3. Step 3: Cross multiply
    20,942.93x = 28,900.45 × 11,991.27
  4. Step 4: Simplify right side
    20,942.93x = 346,553,099.07
  5. Step 5: Solve for x
    x = 346,553,099.07/20,942.93
  6. Step 6: Final answer
    x = 16,547.50

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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.