Home / 20,440.96-28,211.30-12,485.14

Finding the Fourth Proportional to 20,440.96, 28,211.30 and 12,485.14

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Solution

The fourth proportional to 20,440.96, 28,211.30 and 12,485.14 is: 17,231.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,440.96 : 28,211.30 = 12,485.14 : x
  2. Step 2: Convert to fraction form
    20,440.96/28,211.30 = 12,485.14/x
  3. Step 3: Cross multiply
    20,440.96x = 28,211.30 × 12,485.14
  4. Step 4: Simplify right side
    20,440.96x = 352,222,030.08
  5. Step 5: Solve for x
    x = 352,222,030.08/20,440.96
  6. Step 6: Final answer
    x = 17,231.19

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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.