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Finding the Fourth Proportional to 18,459.09, 27,696.37 and 7,931.41

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Solution

The fourth proportional to 18,459.09, 27,696.37 and 7,931.41 is: 11,900.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,459.09 : 27,696.37 = 7,931.41 : x
  2. Step 2: Convert to fraction form
    18,459.09/27,696.37 = 7,931.41/x
  3. Step 3: Cross multiply
    18,459.09x = 27,696.37 × 7,931.41
  4. Step 4: Simplify right side
    18,459.09x = 219,671,355.05
  5. Step 5: Solve for x
    x = 219,671,355.05/18,459.09
  6. Step 6: Final answer
    x = 11,900.45

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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.