Home / 39,015.14-53,840.51-21,109.75

Finding the Fourth Proportional to 39,015.14, 53,840.51 and 21,109.75

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Solution

The fourth proportional to 39,015.14, 53,840.51 and 21,109.75 is: 29,131.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,015.14 : 53,840.51 = 21,109.75 : x
  2. Step 2: Convert to fraction form
    39,015.14/53,840.51 = 21,109.75/x
  3. Step 3: Cross multiply
    39,015.14x = 53,840.51 × 21,109.75
  4. Step 4: Simplify right side
    39,015.14x = 1,136,559,746.89
  5. Step 5: Solve for x
    x = 1,136,559,746.89/39,015.14
  6. Step 6: Final answer
    x = 29,131.25

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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.