Home / 27,900.75-38,471.65-21,512.89

Finding the Fourth Proportional to 27,900.75, 38,471.65 and 21,512.89

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Solution

The fourth proportional to 27,900.75, 38,471.65 and 21,512.89 is: 29,663.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,900.75 : 38,471.65 = 21,512.89 : x
  2. Step 2: Convert to fraction form
    27,900.75/38,471.65 = 21,512.89/x
  3. Step 3: Cross multiply
    27,900.75x = 38,471.65 × 21,512.89
  4. Step 4: Simplify right side
    27,900.75x = 827,636,374.57
  5. Step 5: Solve for x
    x = 827,636,374.57/27,900.75
  6. Step 6: Final answer
    x = 29,663.59

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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.