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Finding the Fourth Proportional to 13,707.29, 18,916.11 and 7,419.67

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Solution

The fourth proportional to 13,707.29, 18,916.11 and 7,419.67 is: 10,239.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,707.29 : 18,916.11 = 7,419.67 : x
  2. Step 2: Convert to fraction form
    13,707.29/18,916.11 = 7,419.67/x
  3. Step 3: Cross multiply
    13,707.29x = 18,916.11 × 7,419.67
  4. Step 4: Simplify right side
    13,707.29x = 140,351,246.59
  5. Step 5: Solve for x
    x = 140,351,246.59/13,707.29
  6. Step 6: Final answer
    x = 10,239.17

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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.