Home / 39,896.25-55,056.51-21,990.93

Finding the Fourth Proportional to 39,896.25, 55,056.51 and 21,990.93

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Solution

The fourth proportional to 39,896.25, 55,056.51 and 21,990.93 is: 30,347.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,896.25 : 55,056.51 = 21,990.93 : x
  2. Step 2: Convert to fraction form
    39,896.25/55,056.51 = 21,990.93/x
  3. Step 3: Cross multiply
    39,896.25x = 55,056.51 × 21,990.93
  4. Step 4: Simplify right side
    39,896.25x = 1,210,743,857.45
  5. Step 5: Solve for x
    x = 1,210,743,857.45/39,896.25
  6. Step 6: Final answer
    x = 30,347.31

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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.