Home / 20,400.24-28,152.54-11,325.75

Finding the Fourth Proportional to 20,400.24, 28,152.54 and 11,325.75

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Solution

The fourth proportional to 20,400.24, 28,152.54 and 11,325.75 is: 15,629.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,400.24 : 28,152.54 = 11,325.75 : x
  2. Step 2: Convert to fraction form
    20,400.24/28,152.54 = 11,325.75/x
  3. Step 3: Cross multiply
    20,400.24x = 28,152.54 × 11,325.75
  4. Step 4: Simplify right side
    20,400.24x = 318,848,629.91
  5. Step 5: Solve for x
    x = 318,848,629.91/20,400.24
  6. Step 6: Final answer
    x = 15,629.65

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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.