Home / 21,950.79-30,288.90-12,998.67

Finding the Fourth Proportional to 21,950.79, 30,288.90 and 12,998.67

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Solution

The fourth proportional to 21,950.79, 30,288.90 and 12,998.67 is: 17,936.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,950.79 : 30,288.90 = 12,998.67 : x
  2. Step 2: Convert to fraction form
    21,950.79/30,288.90 = 12,998.67/x
  3. Step 3: Cross multiply
    21,950.79x = 30,288.90 × 12,998.67
  4. Step 4: Simplify right side
    21,950.79x = 393,715,415.76
  5. Step 5: Solve for x
    x = 393,715,415.76/21,950.79
  6. Step 6: Final answer
    x = 17,936.28

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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.