Home / 20,837.66-28,756.42-11,406.83

Finding the Fourth Proportional to 20,837.66, 28,756.42 and 11,406.83

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Solution

The fourth proportional to 20,837.66, 28,756.42 and 11,406.83 is: 15,741.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,837.66 : 28,756.42 = 11,406.83 : x
  2. Step 2: Convert to fraction form
    20,837.66/28,756.42 = 11,406.83/x
  3. Step 3: Cross multiply
    20,837.66x = 28,756.42 × 11,406.83
  4. Step 4: Simplify right side
    20,837.66x = 328,019,422.05
  5. Step 5: Solve for x
    x = 328,019,422.05/20,837.66
  6. Step 6: Final answer
    x = 15,741.67

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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.