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Finding the Fourth Proportional to 20,802.18, 28,710.01 and 11,850.54

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Solution

The fourth proportional to 20,802.18, 28,710.01 and 11,850.54 is: 16,355.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,802.18 : 28,710.01 = 11,850.54 : x
  2. Step 2: Convert to fraction form
    20,802.18/28,710.01 = 11,850.54/x
  3. Step 3: Cross multiply
    20,802.18x = 28,710.01 × 11,850.54
  4. Step 4: Simplify right side
    20,802.18x = 340,229,029.06
  5. Step 5: Solve for x
    x = 340,229,029.06/20,802.18
  6. Step 6: Final answer
    x = 16,355.45

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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.