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Finding the Fourth Proportional to 13,707.30, 18,916.07 and 7,419.68

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Solution

The fourth proportional to 13,707.30, 18,916.07 and 7,419.68 is: 10,239.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,707.30 : 18,916.07 = 7,419.68 : x
  2. Step 2: Convert to fraction form
    13,707.30/18,916.07 = 7,419.68/x
  3. Step 3: Cross multiply
    13,707.30x = 18,916.07 × 7,419.68
  4. Step 4: Simplify right side
    13,707.30x = 140,351,186.26
  5. Step 5: Solve for x
    x = 140,351,186.26/13,707.30
  6. Step 6: Final answer
    x = 10,239.16

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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.