Home / 39,858.78-55,004.40-21,955.46

Finding the Fourth Proportional to 39,858.78, 55,004.40 and 21,955.46

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Solution

The fourth proportional to 39,858.78, 55,004.40 and 21,955.46 is: 30,298.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,858.78 : 55,004.40 = 21,955.46 : x
  2. Step 2: Convert to fraction form
    39,858.78/55,004.40 = 21,955.46/x
  3. Step 3: Cross multiply
    39,858.78x = 55,004.40 × 21,955.46
  4. Step 4: Simplify right side
    39,858.78x = 1,207,646,629.00
  5. Step 5: Solve for x
    x = 1,207,646,629.00/39,858.78
  6. Step 6: Final answer
    x = 30,298.13

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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.