Home / 38,447.84-57,690.19-20,917.64

Finding the Fourth Proportional to 38,447.84, 57,690.19 and 20,917.64

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Solution

The fourth proportional to 38,447.84, 57,690.19 and 20,917.64 is: 31,386.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,447.84 : 57,690.19 = 20,917.64 : x
  2. Step 2: Convert to fraction form
    38,447.84/57,690.19 = 20,917.64/x
  3. Step 3: Cross multiply
    38,447.84x = 57,690.19 × 20,917.64
  4. Step 4: Simplify right side
    38,447.84x = 1,206,742,625.95
  5. Step 5: Solve for x
    x = 1,206,742,625.95/38,447.84
  6. Step 6: Final answer
    x = 31,386.49

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.