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Finding the Fourth Proportional to 5,720.83, 7,889.60 and 3,927.49

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Solution

The fourth proportional to 5,720.83, 7,889.60 and 3,927.49 is: 5,416.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,720.83 : 7,889.60 = 3,927.49 : x
  2. Step 2: Convert to fraction form
    5,720.83/7,889.60 = 3,927.49/x
  3. Step 3: Cross multiply
    5,720.83x = 7,889.60 × 3,927.49
  4. Step 4: Simplify right side
    5,720.83x = 30,986,315.20
  5. Step 5: Solve for x
    x = 30,986,315.20/5,720.83
  6. Step 6: Final answer
    x = 5,416.40

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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.