Home / 40,143.56-55,395.73-21,990.67

Finding the Fourth Proportional to 40,143.56, 55,395.73 and 21,990.67

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Solution

The fourth proportional to 40,143.56, 55,395.73 and 21,990.67 is: 30,345.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,143.56 : 55,395.73 = 21,990.67 : x
  2. Step 2: Convert to fraction form
    40,143.56/55,395.73 = 21,990.67/x
  3. Step 3: Cross multiply
    40,143.56x = 55,395.73 × 21,990.67
  4. Step 4: Simplify right side
    40,143.56x = 1,218,189,217.84
  5. Step 5: Solve for x
    x = 1,218,189,217.84/40,143.56
  6. Step 6: Final answer
    x = 30,345.82

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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.