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Finding the Fourth Proportional to 28,009.79, 38,663.42 and 25,020.43

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Solution

The fourth proportional to 28,009.79, 38,663.42 and 25,020.43 is: 34,537.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,009.79 : 38,663.42 = 25,020.43 : x
  2. Step 2: Convert to fraction form
    28,009.79/38,663.42 = 25,020.43/x
  3. Step 3: Cross multiply
    28,009.79x = 38,663.42 × 25,020.43
  4. Step 4: Simplify right side
    28,009.79x = 967,375,171.91
  5. Step 5: Solve for x
    x = 967,375,171.91/28,009.79
  6. Step 6: Final answer
    x = 34,537.04

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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.