Home / 4,678.11-6,455.57-2,688.21

Finding the Fourth Proportional to 4,678.11, 6,455.57 and 2,688.21

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Solution

The fourth proportional to 4,678.11, 6,455.57 and 2,688.21 is: 3,709.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,678.11 : 6,455.57 = 2,688.21 : x
  2. Step 2: Convert to fraction form
    4,678.11/6,455.57 = 2,688.21/x
  3. Step 3: Cross multiply
    4,678.11x = 6,455.57 × 2,688.21
  4. Step 4: Simplify right side
    4,678.11x = 17,353,914.39
  5. Step 5: Solve for x
    x = 17,353,914.39/4,678.11
  6. Step 6: Final answer
    x = 3,709.60

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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.