Home / 20,720.05-28,604.50-16,172.98

Finding the Fourth Proportional to 20,720.05, 28,604.50 and 16,172.98

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Solution

The fourth proportional to 20,720.05, 28,604.50 and 16,172.98 is: 22,327.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.05 : 28,604.50 = 16,172.98 : x
  2. Step 2: Convert to fraction form
    20,720.05/28,604.50 = 16,172.98/x
  3. Step 3: Cross multiply
    20,720.05x = 28,604.50 × 16,172.98
  4. Step 4: Simplify right side
    20,720.05x = 462,620,006.41
  5. Step 5: Solve for x
    x = 462,620,006.41/20,720.05
  6. Step 6: Final answer
    x = 22,327.17

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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.