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Finding the Fourth Proportional to 39,399.77, 54,370.60 and 21,494.77

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Solution

The fourth proportional to 39,399.77, 54,370.60 and 21,494.77 is: 29,662.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,399.77 : 54,370.60 = 21,494.77 : x
  2. Step 2: Convert to fraction form
    39,399.77/54,370.60 = 21,494.77/x
  3. Step 3: Cross multiply
    39,399.77x = 54,370.60 × 21,494.77
  4. Step 4: Simplify right side
    39,399.77x = 1,168,683,541.76
  5. Step 5: Solve for x
    x = 1,168,683,541.76/39,399.77
  6. Step 6: Final answer
    x = 29,662.19

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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.