Home / 39,861.72-55,006.56-21,955.32

Finding the Fourth Proportional to 39,861.72, 55,006.56 and 21,955.32

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Solution

The fourth proportional to 39,861.72, 55,006.56 and 21,955.32 is: 30,296.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,861.72 : 55,006.56 = 21,955.32 : x
  2. Step 2: Convert to fraction form
    39,861.72/55,006.56 = 21,955.32/x
  3. Step 3: Cross multiply
    39,861.72x = 55,006.56 × 21,955.32
  4. Step 4: Simplify right side
    39,861.72x = 1,207,686,626.90
  5. Step 5: Solve for x
    x = 1,207,686,626.90/39,861.72
  6. Step 6: Final answer
    x = 30,296.90

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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.