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Finding the Fourth Proportional to 30,676.74, 42,333.69 and 17,428.74

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Solution

The fourth proportional to 30,676.74, 42,333.69 and 17,428.74 is: 24,051.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,676.74 : 42,333.69 = 17,428.74 : x
  2. Step 2: Convert to fraction form
    30,676.74/42,333.69 = 17,428.74/x
  3. Step 3: Cross multiply
    30,676.74x = 42,333.69 × 17,428.74
  4. Step 4: Simplify right side
    30,676.74x = 737,822,876.25
  5. Step 5: Solve for x
    x = 737,822,876.25/30,676.74
  6. Step 6: Final answer
    x = 24,051.54

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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.