Home / 13,707.12-18,915.84-7,419.48

Finding the Fourth Proportional to 13,707.12, 18,915.84 and 7,419.48

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Solution

The fourth proportional to 13,707.12, 18,915.84 and 7,419.48 is: 10,238.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,707.12 : 18,915.84 = 7,419.48 : x
  2. Step 2: Convert to fraction form
    13,707.12/18,915.84 = 7,419.48/x
  3. Step 3: Cross multiply
    13,707.12x = 18,915.84 × 7,419.48
  4. Step 4: Simplify right side
    13,707.12x = 140,345,696.56
  5. Step 5: Solve for x
    x = 140,345,696.56/13,707.12
  6. Step 6: Final answer
    x = 10,238.89

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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.