Home / 20,319.45-28,039.71-11,365.22

Finding the Fourth Proportional to 20,319.45, 28,039.71 and 11,365.22

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Solution

The fourth proportional to 20,319.45, 28,039.71 and 11,365.22 is: 15,683.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,319.45 : 28,039.71 = 11,365.22 : x
  2. Step 2: Convert to fraction form
    20,319.45/28,039.71 = 11,365.22/x
  3. Step 3: Cross multiply
    20,319.45x = 28,039.71 × 11,365.22
  4. Step 4: Simplify right side
    20,319.45x = 318,677,571.40
  5. Step 5: Solve for x
    x = 318,677,571.40/20,319.45
  6. Step 6: Final answer
    x = 15,683.38

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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.