Home / 13,830.20-20,820.05-12,605.48

Finding the Fourth Proportional to 13,830.20, 20,820.05 and 12,605.48

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Solution

The fourth proportional to 13,830.20, 20,820.05 and 12,605.48 is: 18,976.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,830.20 : 20,820.05 = 12,605.48 : x
  2. Step 2: Convert to fraction form
    13,830.20/20,820.05 = 12,605.48/x
  3. Step 3: Cross multiply
    13,830.20x = 20,820.05 × 12,605.48
  4. Step 4: Simplify right side
    13,830.20x = 262,446,723.87
  5. Step 5: Solve for x
    x = 262,446,723.87/13,830.20
  6. Step 6: Final answer
    x = 18,976.35

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.