Home / 20,720.24-28,584.80-14,003.40

Finding the Fourth Proportional to 20,720.24, 28,584.80 and 14,003.40

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Solution

The fourth proportional to 20,720.24, 28,584.80 and 14,003.40 is: 19,318.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,720.24 : 28,584.80 = 14,003.40 : x
  2. Step 2: Convert to fraction form
    20,720.24/28,584.80 = 14,003.40/x
  3. Step 3: Cross multiply
    20,720.24x = 28,584.80 × 14,003.40
  4. Step 4: Simplify right side
    20,720.24x = 400,284,388.32
  5. Step 5: Solve for x
    x = 400,284,388.32/20,720.24
  6. Step 6: Final answer
    x = 19,318.52

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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.