Home / 28,106.21-38,785.38-15,359.09

Finding the Fourth Proportional to 28,106.21, 38,785.38 and 15,359.09

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Solution

The fourth proportional to 28,106.21, 38,785.38 and 15,359.09 is: 21,194.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,106.21 : 38,785.38 = 15,359.09 : x
  2. Step 2: Convert to fraction form
    28,106.21/38,785.38 = 15,359.09/x
  3. Step 3: Cross multiply
    28,106.21x = 38,785.38 × 15,359.09
  4. Step 4: Simplify right side
    28,106.21x = 595,708,142.10
  5. Step 5: Solve for x
    x = 595,708,142.10/28,106.21
  6. Step 6: Final answer
    x = 21,194.89

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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.