Home / 20,403.81-28,157.26-11,454.20

Finding the Fourth Proportional to 20,403.81, 28,157.26 and 11,454.20

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Solution

The fourth proportional to 20,403.81, 28,157.26 and 11,454.20 is: 15,806.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.81 : 28,157.26 = 11,454.20 : x
  2. Step 2: Convert to fraction form
    20,403.81/28,157.26 = 11,454.20/x
  3. Step 3: Cross multiply
    20,403.81x = 28,157.26 × 11,454.20
  4. Step 4: Simplify right side
    20,403.81x = 322,518,879.28
  5. Step 5: Solve for x
    x = 322,518,879.28/20,403.81
  6. Step 6: Final answer
    x = 15,806.79

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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.