Home / 21,905.50-30,287.19-20,926.30

Finding the Fourth Proportional to 21,905.50, 30,287.19 and 20,926.30

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Solution

The fourth proportional to 21,905.50, 30,287.19 and 20,926.30 is: 28,933.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,905.50 : 30,287.19 = 20,926.30 : x
  2. Step 2: Convert to fraction form
    21,905.50/30,287.19 = 20,926.30/x
  3. Step 3: Cross multiply
    21,905.50x = 30,287.19 × 20,926.30
  4. Step 4: Simplify right side
    21,905.50x = 633,798,824.10
  5. Step 5: Solve for x
    x = 633,798,824.10/21,905.50
  6. Step 6: Final answer
    x = 28,933.32

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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.