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Finding the Fourth Proportional to 28,507.70, 39,339.78 and 15,932.42

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Solution

The fourth proportional to 28,507.70, 39,339.78 and 15,932.42 is: 21,986.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,507.70 : 39,339.78 = 15,932.42 : x
  2. Step 2: Convert to fraction form
    28,507.70/39,339.78 = 15,932.42/x
  3. Step 3: Cross multiply
    28,507.70x = 39,339.78 × 15,932.42
  4. Step 4: Simplify right side
    28,507.70x = 626,777,897.67
  5. Step 5: Solve for x
    x = 626,777,897.67/28,507.70
  6. Step 6: Final answer
    x = 21,986.27

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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.