Home / 20,372.77-28,114.52-11,880.78

Finding the Fourth Proportional to 20,372.77, 28,114.52 and 11,880.78

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Solution

The fourth proportional to 20,372.77, 28,114.52 and 11,880.78 is: 16,395.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,372.77 : 28,114.52 = 11,880.78 : x
  2. Step 2: Convert to fraction form
    20,372.77/28,114.52 = 11,880.78/x
  3. Step 3: Cross multiply
    20,372.77x = 28,114.52 × 11,880.78
  4. Step 4: Simplify right side
    20,372.77x = 334,022,295.51
  5. Step 5: Solve for x
    x = 334,022,295.51/20,372.77
  6. Step 6: Final answer
    x = 16,395.53

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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.