Home / 39,090.87-53,945.38-21,185.87

Finding the Fourth Proportional to 39,090.87, 53,945.38 and 21,185.87

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Solution

The fourth proportional to 39,090.87, 53,945.38 and 21,185.87 is: 29,236.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,090.87 : 53,945.38 = 21,185.87 : x
  2. Step 2: Convert to fraction form
    39,090.87/53,945.38 = 21,185.87/x
  3. Step 3: Cross multiply
    39,090.87x = 53,945.38 × 21,185.87
  4. Step 4: Simplify right side
    39,090.87x = 1,142,879,807.78
  5. Step 5: Solve for x
    x = 1,142,879,807.78/39,090.87
  6. Step 6: Final answer
    x = 29,236.49

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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.