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Finding the Fourth Proportional to 30,415.81, 41,668.96 and 29,278.69

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Solution

The fourth proportional to 30,415.81, 41,668.96 and 29,278.69 is: 40,111.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,415.81 : 41,668.96 = 29,278.69 : x
  2. Step 2: Convert to fraction form
    30,415.81/41,668.96 = 29,278.69/x
  3. Step 3: Cross multiply
    30,415.81x = 41,668.96 × 29,278.69
  4. Step 4: Simplify right side
    30,415.81x = 1,220,012,354.12
  5. Step 5: Solve for x
    x = 1,220,012,354.12/30,415.81
  6. Step 6: Final answer
    x = 40,111.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.37) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.