Home / 39,901.56-55,064.54-21,997.28

Finding the Fourth Proportional to 39,901.56, 55,064.54 and 21,997.28

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Solution

The fourth proportional to 39,901.56, 55,064.54 and 21,997.28 is: 30,356.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,901.56 : 55,064.54 = 21,997.28 : x
  2. Step 2: Convert to fraction form
    39,901.56/55,064.54 = 21,997.28/x
  3. Step 3: Cross multiply
    39,901.56x = 55,064.54 × 21,997.28
  4. Step 4: Simplify right side
    39,901.56x = 1,211,270,104.45
  5. Step 5: Solve for x
    x = 1,211,270,104.45/39,901.56
  6. Step 6: Final answer
    x = 30,356.46

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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.