Home / 20,798.21-28,692.94-15,120.51

Finding the Fourth Proportional to 20,798.21, 28,692.94 and 15,120.51

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Solution

The fourth proportional to 20,798.21, 28,692.94 and 15,120.51 is: 20,860.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,798.21 : 28,692.94 = 15,120.51 : x
  2. Step 2: Convert to fraction form
    20,798.21/28,692.94 = 15,120.51/x
  3. Step 3: Cross multiply
    20,798.21x = 28,692.94 × 15,120.51
  4. Step 4: Simplify right side
    20,798.21x = 433,851,886.20
  5. Step 5: Solve for x
    x = 433,851,886.20/20,798.21
  6. Step 6: Final answer
    x = 20,860.06

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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.