Home / 7,815.68-10,785.76-4,672

Finding the Fourth Proportional to 7,815.68, 10,785.76 and 4,672

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Solution

The fourth proportional to 7,815.68, 10,785.76 and 4,672 is: 6,447.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,815.68 : 10,785.76 = 4,672 : x
  2. Step 2: Convert to fraction form
    7,815.68/10,785.76 = 4,672/x
  3. Step 3: Cross multiply
    7,815.68x = 10,785.76 × 4,672
  4. Step 4: Simplify right side
    7,815.68x = 50,391,070.72
  5. Step 5: Solve for x
    x = 50,391,070.72/7,815.68
  6. Step 6: Final answer
    x = 6,447.43

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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.