Home / 13,720.81-18,933.60-7,753

Finding the Fourth Proportional to 13,720.81, 18,933.60 and 7,753

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Solution

The fourth proportional to 13,720.81, 18,933.60 and 7,753 is: 10,698.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,720.81 : 18,933.60 = 7,753 : x
  2. Step 2: Convert to fraction form
    13,720.81/18,933.60 = 7,753/x
  3. Step 3: Cross multiply
    13,720.81x = 18,933.60 × 7,753
  4. Step 4: Simplify right side
    13,720.81x = 146,792,200.80
  5. Step 5: Solve for x
    x = 146,792,200.80/13,720.81
  6. Step 6: Final answer
    x = 10,698.51

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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.