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Finding the Fourth Proportional to 28,041, 42,021.33 and 13,242.30

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Solution

The fourth proportional to 28,041, 42,021.33 and 13,242.30 is: 19,844.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,041 : 42,021.33 = 13,242.30 : x
  2. Step 2: Convert to fraction form
    28,041/42,021.33 = 13,242.30/x
  3. Step 3: Cross multiply
    28,041x = 42,021.33 × 13,242.30
  4. Step 4: Simplify right side
    28,041x = 556,459,058.26
  5. Step 5: Solve for x
    x = 556,459,058.26/28,041
  6. Step 6: Final answer
    x = 19,844.48

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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.