Home / 20,403.28-28,157.03-11,451.47

Finding the Fourth Proportional to 20,403.28, 28,157.03 and 11,451.47

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Solution

The fourth proportional to 20,403.28, 28,157.03 and 11,451.47 is: 15,803.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,403.28 : 28,157.03 = 11,451.47 : x
  2. Step 2: Convert to fraction form
    20,403.28/28,157.03 = 11,451.47/x
  3. Step 3: Cross multiply
    20,403.28x = 28,157.03 × 11,451.47
  4. Step 4: Simplify right side
    20,403.28x = 322,439,243.55
  5. Step 5: Solve for x
    x = 322,439,243.55/20,403.28
  6. Step 6: Final answer
    x = 15,803.30

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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.