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Finding the Fourth Proportional to 5,423.86, 7,485 and 2,939.86

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Solution

The fourth proportional to 5,423.86, 7,485 and 2,939.86 is: 4,057.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,423.86 : 7,485 = 2,939.86 : x
  2. Step 2: Convert to fraction form
    5,423.86/7,485 = 2,939.86/x
  3. Step 3: Cross multiply
    5,423.86x = 7,485 × 2,939.86
  4. Step 4: Simplify right side
    5,423.86x = 22,004,852.10
  5. Step 5: Solve for x
    x = 22,004,852.10/5,423.86
  6. Step 6: Final answer
    x = 4,057.05

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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.