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Finding the Fourth Proportional to 13,607.92, 18,776.76 and 7,938.81

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Solution

The fourth proportional to 13,607.92, 18,776.76 and 7,938.81 is: 10,954.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.92 : 18,776.76 = 7,938.81 : x
  2. Step 2: Convert to fraction form
    13,607.92/18,776.76 = 7,938.81/x
  3. Step 3: Cross multiply
    13,607.92x = 18,776.76 × 7,938.81
  4. Step 4: Simplify right side
    13,607.92x = 149,065,144.94
  5. Step 5: Solve for x
    x = 149,065,144.94/13,607.92
  6. Step 6: Final answer
    x = 10,954.29

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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.