Home / 20,401.98-28,157.63-11,451.68

Finding the Fourth Proportional to 20,401.98, 28,157.63 and 11,451.68

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Solution

The fourth proportional to 20,401.98, 28,157.63 and 11,451.68 is: 15,804.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,401.98 : 28,157.63 = 11,451.68 : x
  2. Step 2: Convert to fraction form
    20,401.98/28,157.63 = 11,451.68/x
  3. Step 3: Cross multiply
    20,401.98x = 28,157.63 × 11,451.68
  4. Step 4: Simplify right side
    20,401.98x = 322,452,075.86
  5. Step 5: Solve for x
    x = 322,452,075.86/20,401.98
  6. Step 6: Final answer
    x = 15,804.94

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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.