Home / 39,896.14-55,054.17-21,990.16

Finding the Fourth Proportional to 39,896.14, 55,054.17 and 21,990.16

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Solution

The fourth proportional to 39,896.14, 55,054.17 and 21,990.16 is: 30,345.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,896.14 : 55,054.17 = 21,990.16 : x
  2. Step 2: Convert to fraction form
    39,896.14/55,054.17 = 21,990.16/x
  3. Step 3: Cross multiply
    39,896.14x = 55,054.17 × 21,990.16
  4. Step 4: Simplify right side
    39,896.14x = 1,210,650,006.97
  5. Step 5: Solve for x
    x = 1,210,650,006.97/39,896.14
  6. Step 6: Final answer
    x = 30,345.04

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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.