Home / 20,858.65-28,785.27-11,426.60

Finding the Fourth Proportional to 20,858.65, 28,785.27 and 11,426.60

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Solution

The fourth proportional to 20,858.65, 28,785.27 and 11,426.60 is: 15,768.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,858.65 : 28,785.27 = 11,426.60 : x
  2. Step 2: Convert to fraction form
    20,858.65/28,785.27 = 11,426.60/x
  3. Step 3: Cross multiply
    20,858.65x = 28,785.27 × 11,426.60
  4. Step 4: Simplify right side
    20,858.65x = 328,917,880.99
  5. Step 5: Solve for x
    x = 328,917,880.99/20,858.65
  6. Step 6: Final answer
    x = 15,768.90

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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.