Home / 13,840.79-19,100.18-7,872.45

Finding the Fourth Proportional to 13,840.79, 19,100.18 and 7,872.45

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Solution

The fourth proportional to 13,840.79, 19,100.18 and 7,872.45 is: 10,863.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,840.79 : 19,100.18 = 7,872.45 : x
  2. Step 2: Convert to fraction form
    13,840.79/19,100.18 = 7,872.45/x
  3. Step 3: Cross multiply
    13,840.79x = 19,100.18 × 7,872.45
  4. Step 4: Simplify right side
    13,840.79x = 150,365,172.68
  5. Step 5: Solve for x
    x = 150,365,172.68/13,840.79
  6. Step 6: Final answer
    x = 10,863.92

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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.