Home / 13,708.49-18,918.62-7,740.32

Finding the Fourth Proportional to 13,708.49, 18,918.62 and 7,740.32

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Solution

The fourth proportional to 13,708.49, 18,918.62 and 7,740.32 is: 10,682.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,708.49 : 18,918.62 = 7,740.32 : x
  2. Step 2: Convert to fraction form
    13,708.49/18,918.62 = 7,740.32/x
  3. Step 3: Cross multiply
    13,708.49x = 18,918.62 × 7,740.32
  4. Step 4: Simplify right side
    13,708.49x = 146,436,039.46
  5. Step 5: Solve for x
    x = 146,436,039.46/13,708.49
  6. Step 6: Final answer
    x = 10,682.15

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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.