Home / 20,830.12-28,741.12-12,334.91

Finding the Fourth Proportional to 20,830.12, 28,741.12 and 12,334.91

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Solution

The fourth proportional to 20,830.12, 28,741.12 and 12,334.91 is: 17,019.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,830.12 : 28,741.12 = 12,334.91 : x
  2. Step 2: Convert to fraction form
    20,830.12/28,741.12 = 12,334.91/x
  3. Step 3: Cross multiply
    20,830.12x = 28,741.12 × 12,334.91
  4. Step 4: Simplify right side
    20,830.12x = 354,519,128.50
  5. Step 5: Solve for x
    x = 354,519,128.50/20,830.12
  6. Step 6: Final answer
    x = 17,019.54

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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.