Home / 20,815.51-28,725.83-11,384.68

Finding the Fourth Proportional to 20,815.51, 28,725.83 and 11,384.68

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Solution

The fourth proportional to 20,815.51, 28,725.83 and 11,384.68 is: 15,711.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.51 : 28,725.83 = 11,384.68 : x
  2. Step 2: Convert to fraction form
    20,815.51/28,725.83 = 11,384.68/x
  3. Step 3: Cross multiply
    20,815.51x = 28,725.83 × 11,384.68
  4. Step 4: Simplify right side
    20,815.51x = 327,034,382.28
  5. Step 5: Solve for x
    x = 327,034,382.28/20,815.51
  6. Step 6: Final answer
    x = 15,711.09

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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.