Home / 20,790.24-28,692.48-11,360.20

Finding the Fourth Proportional to 20,790.24, 28,692.48 and 11,360.20

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Solution

The fourth proportional to 20,790.24, 28,692.48 and 11,360.20 is: 15,678.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.24 : 28,692.48 = 11,360.20 : x
  2. Step 2: Convert to fraction form
    20,790.24/28,692.48 = 11,360.20/x
  3. Step 3: Cross multiply
    20,790.24x = 28,692.48 × 11,360.20
  4. Step 4: Simplify right side
    20,790.24x = 325,952,311.30
  5. Step 5: Solve for x
    x = 325,952,311.30/20,790.24
  6. Step 6: Final answer
    x = 15,678.14

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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.