Home / 13,760.40-18,991.20-7,792.32

Finding the Fourth Proportional to 13,760.40, 18,991.20 and 7,792.32

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Solution

The fourth proportional to 13,760.40, 18,991.20 and 7,792.32 is: 10,754.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,760.40 : 18,991.20 = 7,792.32 : x
  2. Step 2: Convert to fraction form
    13,760.40/18,991.20 = 7,792.32/x
  3. Step 3: Cross multiply
    13,760.40x = 18,991.20 × 7,792.32
  4. Step 4: Simplify right side
    13,760.40x = 147,985,507.58
  5. Step 5: Solve for x
    x = 147,985,507.58/13,760.40
  6. Step 6: Final answer
    x = 10,754.45

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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.