Home / 39,012.60-53,837.40-21,107.60

Finding the Fourth Proportional to 39,012.60, 53,837.40 and 21,107.60

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Solution

The fourth proportional to 39,012.60, 53,837.40 and 21,107.60 is: 29,128.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,012.60 : 53,837.40 = 21,107.60 : x
  2. Step 2: Convert to fraction form
    39,012.60/53,837.40 = 21,107.60/x
  3. Step 3: Cross multiply
    39,012.60x = 53,837.40 × 21,107.60
  4. Step 4: Simplify right side
    39,012.60x = 1,136,378,035.05
  5. Step 5: Solve for x
    x = 1,136,378,035.05/39,012.60
  6. Step 6: Final answer
    x = 29,128.49

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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.