Home / 20,628.31-30,919.43-18,967.63

Finding the Fourth Proportional to 20,628.31, 30,919.43 and 18,967.63

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Solution

The fourth proportional to 20,628.31, 30,919.43 and 18,967.63 is: 28,430.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,628.31 : 30,919.43 = 18,967.63 : x
  2. Step 2: Convert to fraction form
    20,628.31/30,919.43 = 18,967.63/x
  3. Step 3: Cross multiply
    20,628.31x = 30,919.43 × 18,967.63
  4. Step 4: Simplify right side
    20,628.31x = 586,468,213.21
  5. Step 5: Solve for x
    x = 586,468,213.21/20,628.31
  6. Step 6: Final answer
    x = 28,430.26

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.