Home / 39,895.52-55,053.31-21,989.54

Finding the Fourth Proportional to 39,895.52, 55,053.31 and 21,989.54

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Solution

The fourth proportional to 39,895.52, 55,053.31 and 21,989.54 is: 30,344.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,895.52 : 55,053.31 = 21,989.54 : x
  2. Step 2: Convert to fraction form
    39,895.52/55,053.31 = 21,989.54/x
  3. Step 3: Cross multiply
    39,895.52x = 55,053.31 × 21,989.54
  4. Step 4: Simplify right side
    39,895.52x = 1,210,596,632.14
  5. Step 5: Solve for x
    x = 1,210,596,632.14/39,895.52
  6. Step 6: Final answer
    x = 30,344.18

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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.