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Finding the Fourth Proportional to 38,691, 53,393.58 and 22,785.30

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Solution

The fourth proportional to 38,691, 53,393.58 and 22,785.30 is: 31,443.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,691 : 53,393.58 = 22,785.30 : x
  2. Step 2: Convert to fraction form
    38,691/53,393.58 = 22,785.30/x
  3. Step 3: Cross multiply
    38,691x = 53,393.58 × 22,785.30
  4. Step 4: Simplify right side
    38,691x = 1,216,588,738.37
  5. Step 5: Solve for x
    x = 1,216,588,738.37/38,691
  6. Step 6: Final answer
    x = 31,443.71

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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.