Home / 30,231.63-41,675.70-21,128.73

Finding the Fourth Proportional to 30,231.63, 41,675.70 and 21,128.73

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Solution

The fourth proportional to 30,231.63, 41,675.70 and 21,128.73 is: 29,126.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,231.63 : 41,675.70 = 21,128.73 : x
  2. Step 2: Convert to fraction form
    30,231.63/41,675.70 = 21,128.73/x
  3. Step 3: Cross multiply
    30,231.63x = 41,675.70 × 21,128.73
  4. Step 4: Simplify right side
    30,231.63x = 880,554,612.86
  5. Step 5: Solve for x
    x = 880,554,612.86/30,231.63
  6. Step 6: Final answer
    x = 29,126.93

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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.