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Finding the Fourth Proportional to 39,621, 54,678.60 and 22,854

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Solution

The fourth proportional to 39,621, 54,678.60 and 22,854 is: 31,539.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,621 : 54,678.60 = 22,854 : x
  2. Step 2: Convert to fraction form
    39,621/54,678.60 = 22,854/x
  3. Step 3: Cross multiply
    39,621x = 54,678.60 × 22,854
  4. Step 4: Simplify right side
    39,621x = 1,249,624,724.40
  5. Step 5: Solve for x
    x = 1,249,624,724.40/39,621
  6. Step 6: Final answer
    x = 31,539.45

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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.