Home / 28,036.28-38,692.80-20,950.40

Finding the Fourth Proportional to 28,036.28, 38,692.80 and 20,950.40

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Solution

The fourth proportional to 28,036.28, 38,692.80 and 20,950.40 is: 28,913.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,036.28 : 38,692.80 = 20,950.40 : x
  2. Step 2: Convert to fraction form
    28,036.28/38,692.80 = 20,950.40/x
  3. Step 3: Cross multiply
    28,036.28x = 38,692.80 × 20,950.40
  4. Step 4: Simplify right side
    28,036.28x = 810,629,637.12
  5. Step 5: Solve for x
    x = 810,629,637.12/28,036.28
  6. Step 6: Final answer
    x = 28,913.59

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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.