Home / 20,936.16-28,890.23-11,981.61

Finding the Fourth Proportional to 20,936.16, 28,890.23 and 11,981.61

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Solution

The fourth proportional to 20,936.16, 28,890.23 and 11,981.61 is: 16,533.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,936.16 : 28,890.23 = 11,981.61 : x
  2. Step 2: Convert to fraction form
    20,936.16/28,890.23 = 11,981.61/x
  3. Step 3: Cross multiply
    20,936.16x = 28,890.23 × 11,981.61
  4. Step 4: Simplify right side
    20,936.16x = 346,151,408.76
  5. Step 5: Solve for x
    x = 346,151,408.76/20,936.16
  6. Step 6: Final answer
    x = 16,533.66

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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.