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Finding the Fourth Proportional to 18,639.61, 27,950.78 and 6,949.69

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Solution

The fourth proportional to 18,639.61, 27,950.78 and 6,949.69 is: 10,421.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,639.61 : 27,950.78 = 6,949.69 : x
  2. Step 2: Convert to fraction form
    18,639.61/27,950.78 = 6,949.69/x
  3. Step 3: Cross multiply
    18,639.61x = 27,950.78 × 6,949.69
  4. Step 4: Simplify right side
    18,639.61x = 194,249,221.51
  5. Step 5: Solve for x
    x = 194,249,221.51/18,639.61
  6. Step 6: Final answer
    x = 10,421.31

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.