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Finding the Fourth Proportional to 30,187.70, 41,650.52 and 18,868.68

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Solution

The fourth proportional to 30,187.70, 41,650.52 and 18,868.68 is: 26,033.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,187.70 : 41,650.52 = 18,868.68 : x
  2. Step 2: Convert to fraction form
    30,187.70/41,650.52 = 18,868.68/x
  3. Step 3: Cross multiply
    30,187.70x = 41,650.52 × 18,868.68
  4. Step 4: Simplify right side
    30,187.70x = 785,890,345.51
  5. Step 5: Solve for x
    x = 785,890,345.51/30,187.70
  6. Step 6: Final answer
    x = 26,033.46

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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.