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Finding the Fourth Proportional to 28,076.61, 38,699.58 and 19,903

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Solution

The fourth proportional to 28,076.61, 38,699.58 and 19,903 is: 27,433.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,076.61 : 38,699.58 = 19,903 : x
  2. Step 2: Convert to fraction form
    28,076.61/38,699.58 = 19,903/x
  3. Step 3: Cross multiply
    28,076.61x = 38,699.58 × 19,903
  4. Step 4: Simplify right side
    28,076.61x = 770,237,740.74
  5. Step 5: Solve for x
    x = 770,237,740.74/28,076.61
  6. Step 6: Final answer
    x = 27,433.43

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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.