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Finding the Fourth Proportional to 52,860, 79,290 and 20,028

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Solution

The fourth proportional to 52,860, 79,290 and 20,028 is: 30,042

Step by Step Solution

  1. Step 1: Write the proportion equation
    52,860 : 79,290 = 20,028 : x
  2. Step 2: Convert to fraction form
    52,860/79,290 = 20,028/x
  3. Step 3: Cross multiply
    52,860x = 79,290 × 20,028
  4. Step 4: Simplify right side
    52,860x = 1,588,020,120
  5. Step 5: Solve for x
    x = 1,588,020,120/52,860
  6. Step 6: Final answer
    x = 30,042

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.