Home / 20,935.86-28,890.43-11,981.31

Finding the Fourth Proportional to 20,935.86, 28,890.43 and 11,981.31

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Solution

The fourth proportional to 20,935.86, 28,890.43 and 11,981.31 is: 16,533.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,935.86 : 28,890.43 = 11,981.31 : x
  2. Step 2: Convert to fraction form
    20,935.86/28,890.43 = 11,981.31/x
  3. Step 3: Cross multiply
    20,935.86x = 28,890.43 × 11,981.31
  4. Step 4: Simplify right side
    20,935.86x = 346,145,197.86
  5. Step 5: Solve for x
    x = 346,145,197.86/20,935.86
  6. Step 6: Final answer
    x = 16,533.60

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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.