Home / 20,763.79-31,154.81-10,900.78

Finding the Fourth Proportional to 20,763.79, 31,154.81 and 10,900.78

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Solution

The fourth proportional to 20,763.79, 31,154.81 and 10,900.78 is: 16,355.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,763.79 : 31,154.81 = 10,900.78 : x
  2. Step 2: Convert to fraction form
    20,763.79/31,154.81 = 10,900.78/x
  3. Step 3: Cross multiply
    20,763.79x = 31,154.81 × 10,900.78
  4. Step 4: Simplify right side
    20,763.79x = 339,611,729.75
  5. Step 5: Solve for x
    x = 339,611,729.75/20,763.79
  6. Step 6: Final answer
    x = 16,355.96

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.