Home / 20,113.08-30,023.20-18,630.78

Finding the Fourth Proportional to 20,113.08, 30,023.20 and 18,630.78

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Solution

The fourth proportional to 20,113.08, 30,023.20 and 18,630.78 is: 27,810.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,113.08 : 30,023.20 = 18,630.78 : x
  2. Step 2: Convert to fraction form
    20,113.08/30,023.20 = 18,630.78/x
  3. Step 3: Cross multiply
    20,113.08x = 30,023.20 × 18,630.78
  4. Step 4: Simplify right side
    20,113.08x = 559,355,634.10
  5. Step 5: Solve for x
    x = 559,355,634.10/20,113.08
  6. Step 6: Final answer
    x = 27,810.54

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.