Home / 12,108.53-18,134.09-7,712.66

Finding the Fourth Proportional to 12,108.53, 18,134.09 and 7,712.66

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Solution

The fourth proportional to 12,108.53, 18,134.09 and 7,712.66 is: 11,550.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,108.53 : 18,134.09 = 7,712.66 : x
  2. Step 2: Convert to fraction form
    12,108.53/18,134.09 = 7,712.66/x
  3. Step 3: Cross multiply
    12,108.53x = 18,134.09 × 7,712.66
  4. Step 4: Simplify right side
    12,108.53x = 139,862,038.27
  5. Step 5: Solve for x
    x = 139,862,038.27/12,108.53
  6. Step 6: Final answer
    x = 11,550.70

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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.