Home / 28,121.38-42,166.10-11,461.90

Finding the Fourth Proportional to 28,121.38, 42,166.10 and 11,461.90

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Solution

The fourth proportional to 28,121.38, 42,166.10 and 11,461.90 is: 17,186.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,121.38 : 42,166.10 = 11,461.90 : x
  2. Step 2: Convert to fraction form
    28,121.38/42,166.10 = 11,461.90/x
  3. Step 3: Cross multiply
    28,121.38x = 42,166.10 × 11,461.90
  4. Step 4: Simplify right side
    28,121.38x = 483,303,564.28
  5. Step 5: Solve for x
    x = 483,303,564.28/28,121.38
  6. Step 6: Final answer
    x = 17,186.34

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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.