Home / 30,910.71-42,666.84-18,163.67

Finding the Fourth Proportional to 30,910.71, 42,666.84 and 18,163.67

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Solution

The fourth proportional to 30,910.71, 42,666.84 and 18,163.67 is: 25,071.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,910.71 : 42,666.84 = 18,163.67 : x
  2. Step 2: Convert to fraction form
    30,910.71/42,666.84 = 18,163.67/x
  3. Step 3: Cross multiply
    30,910.71x = 42,666.84 × 18,163.67
  4. Step 4: Simplify right side
    30,910.71x = 774,986,401.70
  5. Step 5: Solve for x
    x = 774,986,401.70/30,910.71
  6. Step 6: Final answer
    x = 25,071.78

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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.