Home / 39,869.50-55,022.43-21,964.54

Finding the Fourth Proportional to 39,869.50, 55,022.43 and 21,964.54

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Solution

The fourth proportional to 39,869.50, 55,022.43 and 21,964.54 is: 30,312.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,869.50 : 55,022.43 = 21,964.54 : x
  2. Step 2: Convert to fraction form
    39,869.50/55,022.43 = 21,964.54/x
  3. Step 3: Cross multiply
    39,869.50x = 55,022.43 × 21,964.54
  4. Step 4: Simplify right side
    39,869.50x = 1,208,542,364.63
  5. Step 5: Solve for x
    x = 1,208,542,364.63/39,869.50
  6. Step 6: Final answer
    x = 30,312.45

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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.