Home / 12,108.72-16,703.76-8,130.96

Finding the Fourth Proportional to 12,108.72, 16,703.76 and 8,130.96

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Solution

The fourth proportional to 12,108.72, 16,703.76 and 8,130.96 is: 11,216.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.72 : 16,703.76 = 8,130.96 : x
  2. Step 2: Convert to fraction form
    12,108.72/16,703.76 = 8,130.96/x
  3. Step 3: Cross multiply
    12,108.72x = 16,703.76 × 8,130.96
  4. Step 4: Simplify right side
    12,108.72x = 135,817,604.41
  5. Step 5: Solve for x
    x = 135,817,604.41/12,108.72
  6. Step 6: Final answer
    x = 11,216.51

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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.