Home / 21,742.71-30,000.83-20,635.44

Finding the Fourth Proportional to 21,742.71, 30,000.83 and 20,635.44

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Solution

The fourth proportional to 21,742.71, 30,000.83 and 20,635.44 is: 28,473.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,742.71 : 30,000.83 = 20,635.44 : x
  2. Step 2: Convert to fraction form
    21,742.71/30,000.83 = 20,635.44/x
  3. Step 3: Cross multiply
    21,742.71x = 30,000.83 × 20,635.44
  4. Step 4: Simplify right side
    21,742.71x = 619,080,224.24
  5. Step 5: Solve for x
    x = 619,080,224.24/21,742.71
  6. Step 6: Final answer
    x = 28,473.00

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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.