Home / 20,384.85-28,131.14-11,892.81

Finding the Fourth Proportional to 20,384.85, 28,131.14 and 11,892.81

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Solution

The fourth proportional to 20,384.85, 28,131.14 and 11,892.81 is: 16,412.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.85 : 28,131.14 = 11,892.81 : x
  2. Step 2: Convert to fraction form
    20,384.85/28,131.14 = 11,892.81/x
  3. Step 3: Cross multiply
    20,384.85x = 28,131.14 × 11,892.81
  4. Step 4: Simplify right side
    20,384.85x = 334,558,102.98
  5. Step 5: Solve for x
    x = 334,558,102.98/20,384.85
  6. Step 6: Final answer
    x = 16,412.10

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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.