Home / 39,890.37-55,046.46-21,985.32

Finding the Fourth Proportional to 39,890.37, 55,046.46 and 21,985.32

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Solution

The fourth proportional to 39,890.37, 55,046.46 and 21,985.32 is: 30,338.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,890.37 : 55,046.46 = 21,985.32 : x
  2. Step 2: Convert to fraction form
    39,890.37/55,046.46 = 21,985.32/x
  3. Step 3: Cross multiply
    39,890.37x = 55,046.46 × 21,985.32
  4. Step 4: Simplify right side
    39,890.37x = 1,210,214,037.97
  5. Step 5: Solve for x
    x = 1,210,214,037.97/39,890.37
  6. Step 6: Final answer
    x = 30,338.50

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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.