Home / 39,015.20-53,840.59-21,109.81

Finding the Fourth Proportional to 39,015.20, 53,840.59 and 21,109.81

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Solution

The fourth proportional to 39,015.20, 53,840.59 and 21,109.81 is: 29,131.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,015.20 : 53,840.59 = 21,109.81 : x
  2. Step 2: Convert to fraction form
    39,015.20/53,840.59 = 21,109.81/x
  3. Step 3: Cross multiply
    39,015.20x = 53,840.59 × 21,109.81
  4. Step 4: Simplify right side
    39,015.20x = 1,136,564,625.19
  5. Step 5: Solve for x
    x = 1,136,564,625.19/39,015.20
  6. Step 6: Final answer
    x = 29,131.33

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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.