Home / 39,112.85-53,975.62-21,207.80

Finding the Fourth Proportional to 39,112.85, 53,975.62 and 21,207.80

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Solution

The fourth proportional to 39,112.85, 53,975.62 and 21,207.80 is: 29,266.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,112.85 : 53,975.62 = 21,207.80 : x
  2. Step 2: Convert to fraction form
    39,112.85/53,975.62 = 21,207.80/x
  3. Step 3: Cross multiply
    39,112.85x = 53,975.62 × 21,207.80
  4. Step 4: Simplify right side
    39,112.85x = 1,144,704,153.84
  5. Step 5: Solve for x
    x = 1,144,704,153.84/39,112.85
  6. Step 6: Final answer
    x = 29,266.70

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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.