Home / 51,315.84-76,966.32-13,878.09

Finding the Fourth Proportional to 51,315.84, 76,966.32 and 13,878.09

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Solution

The fourth proportional to 51,315.84, 76,966.32 and 13,878.09 is: 20,815.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,315.84 : 76,966.32 = 13,878.09 : x
  2. Step 2: Convert to fraction form
    51,315.84/76,966.32 = 13,878.09/x
  3. Step 3: Cross multiply
    51,315.84x = 76,966.32 × 13,878.09
  4. Step 4: Simplify right side
    51,315.84x = 1,068,145,515.93
  5. Step 5: Solve for x
    x = 1,068,145,515.93/51,315.84
  6. Step 6: Final answer
    x = 20,815.12

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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.