Home / 14,270.40-21,431.20-13,809.60

Finding the Fourth Proportional to 14,270.40, 21,431.20 and 13,809.60

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Solution

The fourth proportional to 14,270.40, 21,431.20 and 13,809.60 is: 20,739.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,270.40 : 21,431.20 = 13,809.60 : x
  2. Step 2: Convert to fraction form
    14,270.40/21,431.20 = 13,809.60/x
  3. Step 3: Cross multiply
    14,270.40x = 21,431.20 × 13,809.60
  4. Step 4: Simplify right side
    14,270.40x = 295,956,299.52
  5. Step 5: Solve for x
    x = 295,956,299.52/14,270.40
  6. Step 6: Final answer
    x = 20,739.17

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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.