Home / 40,387.07-55,735.40-21,991.40

Finding the Fourth Proportional to 40,387.07, 55,735.40 and 21,991.40

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Solution

The fourth proportional to 40,387.07, 55,735.40 and 21,991.40 is: 30,348.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,387.07 : 55,735.40 = 21,991.40 : x
  2. Step 2: Convert to fraction form
    40,387.07/55,735.40 = 21,991.40/x
  3. Step 3: Cross multiply
    40,387.07x = 55,735.40 × 21,991.40
  4. Step 4: Simplify right side
    40,387.07x = 1,225,699,475.56
  5. Step 5: Solve for x
    x = 1,225,699,475.56/40,387.07
  6. Step 6: Final answer
    x = 30,348.81

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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.