Home / 39,902.14-55,065.34-21,997.80

Finding the Fourth Proportional to 39,902.14, 55,065.34 and 21,997.80

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Solution

The fourth proportional to 39,902.14, 55,065.34 and 21,997.80 is: 30,357.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,902.14 : 55,065.34 = 21,997.80 : x
  2. Step 2: Convert to fraction form
    39,902.14/55,065.34 = 21,997.80/x
  3. Step 3: Cross multiply
    39,902.14x = 55,065.34 × 21,997.80
  4. Step 4: Simplify right side
    39,902.14x = 1,211,316,580.49
  5. Step 5: Solve for x
    x = 1,211,316,580.49/39,902.14
  6. Step 6: Final answer
    x = 30,357.18

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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.