Home / 13,740.21-18,960.21-7,772.31

Finding the Fourth Proportional to 13,740.21, 18,960.21 and 7,772.31

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Solution

The fourth proportional to 13,740.21, 18,960.21 and 7,772.31 is: 10,725.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,740.21 : 18,960.21 = 7,772.31 : x
  2. Step 2: Convert to fraction form
    13,740.21/18,960.21 = 7,772.31/x
  3. Step 3: Cross multiply
    13,740.21x = 18,960.21 × 7,772.31
  4. Step 4: Simplify right side
    13,740.21x = 147,364,629.79
  5. Step 5: Solve for x
    x = 147,364,629.79/13,740.21
  6. Step 6: Final answer
    x = 10,725.06

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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.