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Finding the Fourth Proportional to 20,796.71, 28,690.88 and 15,119.01

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Solution

The fourth proportional to 20,796.71, 28,690.88 and 15,119.01 is: 20,858.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,796.71 : 28,690.88 = 15,119.01 : x
  2. Step 2: Convert to fraction form
    20,796.71/28,690.88 = 15,119.01/x
  3. Step 3: Cross multiply
    20,796.71x = 28,690.88 × 15,119.01
  4. Step 4: Simplify right side
    20,796.71x = 433,777,626.03
  5. Step 5: Solve for x
    x = 433,777,626.03/20,796.71
  6. Step 6: Final answer
    x = 20,858.00

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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.