Home / 20,331.92-28,075.37-12,790.88

Finding the Fourth Proportional to 20,331.92, 28,075.37 and 12,790.88

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Solution

The fourth proportional to 20,331.92, 28,075.37 and 12,790.88 is: 17,662.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,331.92 : 28,075.37 = 12,790.88 : x
  2. Step 2: Convert to fraction form
    20,331.92/28,075.37 = 12,790.88/x
  3. Step 3: Cross multiply
    20,331.92x = 28,075.37 × 12,790.88
  4. Step 4: Simplify right side
    20,331.92x = 359,108,548.25
  5. Step 5: Solve for x
    x = 359,108,548.25/20,331.92
  6. Step 6: Final answer
    x = 17,662.30

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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.