Home / 39,893.28-55,055.52-21,990.48

Finding the Fourth Proportional to 39,893.28, 55,055.52 and 21,990.48

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Solution

The fourth proportional to 39,893.28, 55,055.52 and 21,990.48 is: 30,348.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,893.28 : 55,055.52 = 21,990.48 : x
  2. Step 2: Convert to fraction form
    39,893.28/55,055.52 = 21,990.48/x
  3. Step 3: Cross multiply
    39,893.28x = 55,055.52 × 21,990.48
  4. Step 4: Simplify right side
    39,893.28x = 1,210,697,311.45
  5. Step 5: Solve for x
    x = 1,210,697,311.45/39,893.28
  6. Step 6: Final answer
    x = 30,348.40

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Similar ratio
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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.