Home / 12,099.88-16,688.10-8,118.28

Finding the Fourth Proportional to 12,099.88, 16,688.10 and 8,118.28

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Solution

The fourth proportional to 12,099.88, 16,688.10 and 8,118.28 is: 11,196.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,099.88 : 16,688.10 = 8,118.28 : x
  2. Step 2: Convert to fraction form
    12,099.88/16,688.10 = 8,118.28/x
  3. Step 3: Cross multiply
    12,099.88x = 16,688.10 × 8,118.28
  4. Step 4: Simplify right side
    12,099.88x = 135,478,668.47
  5. Step 5: Solve for x
    x = 135,478,668.47/12,099.88
  6. Step 6: Final answer
    x = 11,196.70

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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.