Home / 40,140.35-55,393.74-21,990.67

Finding the Fourth Proportional to 40,140.35, 55,393.74 and 21,990.67

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Solution

The fourth proportional to 40,140.35, 55,393.74 and 21,990.67 is: 30,347.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,140.35 : 55,393.74 = 21,990.67 : x
  2. Step 2: Convert to fraction form
    40,140.35/55,393.74 = 21,990.67/x
  3. Step 3: Cross multiply
    40,140.35x = 55,393.74 × 21,990.67
  4. Step 4: Simplify right side
    40,140.35x = 1,218,145,317.92
  5. Step 5: Solve for x
    x = 1,218,145,317.92/40,140.35
  6. Step 6: Final answer
    x = 30,347.15

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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.