Home / 5,431.68-8,108.10-4,775.58

Finding the Fourth Proportional to 5,431.68, 8,108.10 and 4,775.58

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Solution

The fourth proportional to 5,431.68, 8,108.10 and 4,775.58 is: 7,128.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,431.68 : 8,108.10 = 4,775.58 : x
  2. Step 2: Convert to fraction form
    5,431.68/8,108.10 = 4,775.58/x
  3. Step 3: Cross multiply
    5,431.68x = 8,108.10 × 4,775.58
  4. Step 4: Simplify right side
    5,431.68x = 38,720,880.20
  5. Step 5: Solve for x
    x = 38,720,880.20/5,431.68
  6. Step 6: Final answer
    x = 7,128.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.