Home / 20,858.41-28,784.46-11,426.77

Finding the Fourth Proportional to 20,858.41, 28,784.46 and 11,426.77

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Solution

The fourth proportional to 20,858.41, 28,784.46 and 11,426.77 is: 15,768.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.41 : 28,784.46 = 11,426.77 : x
  2. Step 2: Convert to fraction form
    20,858.41/28,784.46 = 11,426.77/x
  3. Step 3: Cross multiply
    20,858.41x = 28,784.46 × 11,426.77
  4. Step 4: Simplify right side
    20,858.41x = 328,913,403.99
  5. Step 5: Solve for x
    x = 328,913,403.99/20,858.41
  6. Step 6: Final answer
    x = 15,768.86

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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.