Home / 28,105.57-38,785.21-15,358.47

Finding the Fourth Proportional to 28,105.57, 38,785.21 and 15,358.47

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Solution

The fourth proportional to 28,105.57, 38,785.21 and 15,358.47 is: 21,194.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,105.57 : 38,785.21 = 15,358.47 : x
  2. Step 2: Convert to fraction form
    28,105.57/38,785.21 = 15,358.47/x
  3. Step 3: Cross multiply
    28,105.57x = 38,785.21 × 15,358.47
  4. Step 4: Simplify right side
    28,105.57x = 595,681,484.23
  5. Step 5: Solve for x
    x = 595,681,484.23/28,105.57
  6. Step 6: Final answer
    x = 21,194.43

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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.