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Finding the Fourth Proportional to 13,119.66, 18,099.93 and 8,645.58

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Solution

The fourth proportional to 13,119.66, 18,099.93 and 8,645.58 is: 11,927.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,119.66 : 18,099.93 = 8,645.58 : x
  2. Step 2: Convert to fraction form
    13,119.66/18,099.93 = 8,645.58/x
  3. Step 3: Cross multiply
    13,119.66x = 18,099.93 × 8,645.58
  4. Step 4: Simplify right side
    13,119.66x = 156,484,392.81
  5. Step 5: Solve for x
    x = 156,484,392.81/13,119.66
  6. Step 6: Final answer
    x = 11,927.47

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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.