Home / 12,315.66-16,996.68-10,072.78

Finding the Fourth Proportional to 12,315.66, 16,996.68 and 10,072.78

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Solution

The fourth proportional to 12,315.66, 16,996.68 and 10,072.78 is: 13,901.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,315.66 : 16,996.68 = 10,072.78 : x
  2. Step 2: Convert to fraction form
    12,315.66/16,996.68 = 10,072.78/x
  3. Step 3: Cross multiply
    12,315.66x = 16,996.68 × 10,072.78
  4. Step 4: Simplify right side
    12,315.66x = 171,203,818.37
  5. Step 5: Solve for x
    x = 171,203,818.37/12,315.66
  6. Step 6: Final answer
    x = 13,901.31

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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.