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Finding the Fourth Proportional to 28,010.79, 38,664.80 and 25,021.43

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Solution

The fourth proportional to 28,010.79, 38,664.80 and 25,021.43 is: 34,538.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,010.79 : 38,664.80 = 25,021.43 : x
  2. Step 2: Convert to fraction form
    28,010.79/38,664.80 = 25,021.43/x
  3. Step 3: Cross multiply
    28,010.79x = 38,664.80 × 25,021.43
  4. Step 4: Simplify right side
    28,010.79x = 967,448,586.66
  5. Step 5: Solve for x
    x = 967,448,586.66/28,010.79
  6. Step 6: Final answer
    x = 34,538.43

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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.