Home / 20,364.81-28,102.98-11,866.40

Finding the Fourth Proportional to 20,364.81, 28,102.98 and 11,866.40

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Solution

The fourth proportional to 20,364.81, 28,102.98 and 11,866.40 is: 16,375.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,364.81 : 28,102.98 = 11,866.40 : x
  2. Step 2: Convert to fraction form
    20,364.81/28,102.98 = 11,866.40/x
  3. Step 3: Cross multiply
    20,364.81x = 28,102.98 × 11,866.40
  4. Step 4: Simplify right side
    20,364.81x = 333,481,369.32
  5. Step 5: Solve for x
    x = 333,481,369.32/20,364.81
  6. Step 6: Final answer
    x = 16,375.37

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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.