Home / 39,043.02-53,879.40-21,138.04

Finding the Fourth Proportional to 39,043.02, 53,879.40 and 21,138.04

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Solution

The fourth proportional to 39,043.02, 53,879.40 and 21,138.04 is: 29,170.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,043.02 : 53,879.40 = 21,138.04 : x
  2. Step 2: Convert to fraction form
    39,043.02/53,879.40 = 21,138.04/x
  3. Step 3: Cross multiply
    39,043.02x = 53,879.40 × 21,138.04
  4. Step 4: Simplify right side
    39,043.02x = 1,138,904,912.38
  5. Step 5: Solve for x
    x = 1,138,904,912.38/39,043.02
  6. Step 6: Final answer
    x = 29,170.51

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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.