Home / 39,890.96-55,047.04-21,986.11

Finding the Fourth Proportional to 39,890.96, 55,047.04 and 21,986.11

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Solution

The fourth proportional to 39,890.96, 55,047.04 and 21,986.11 is: 30,339.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,890.96 : 55,047.04 = 21,986.11 : x
  2. Step 2: Convert to fraction form
    39,890.96/55,047.04 = 21,986.11/x
  3. Step 3: Cross multiply
    39,890.96x = 55,047.04 × 21,986.11
  4. Step 4: Simplify right side
    39,890.96x = 1,210,270,259.31
  5. Step 5: Solve for x
    x = 1,210,270,259.31/39,890.96
  6. Step 6: Final answer
    x = 30,339.46

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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.