Home / 39,015.08-53,840.42-21,109.68

Finding the Fourth Proportional to 39,015.08, 53,840.42 and 21,109.68

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Solution

The fourth proportional to 39,015.08, 53,840.42 and 21,109.68 is: 29,131.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,015.08 : 53,840.42 = 21,109.68 : x
  2. Step 2: Convert to fraction form
    39,015.08/53,840.42 = 21,109.68/x
  3. Step 3: Cross multiply
    39,015.08x = 53,840.42 × 21,109.68
  4. Step 4: Simplify right side
    39,015.08x = 1,136,554,037.27
  5. Step 5: Solve for x
    x = 1,136,554,037.27/39,015.08
  6. Step 6: Final answer
    x = 29,131.15

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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.