Home / 13,889.97-19,168-7,921.48

Finding the Fourth Proportional to 13,889.97, 19,168 and 7,921.48

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Solution

The fourth proportional to 13,889.97, 19,168 and 7,921.48 is: 10,931.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889.97 : 19,168 = 7,921.48 : x
  2. Step 2: Convert to fraction form
    13,889.97/19,168 = 7,921.48/x
  3. Step 3: Cross multiply
    13,889.97x = 19,168 × 7,921.48
  4. Step 4: Simplify right side
    13,889.97x = 151,838,928.64
  5. Step 5: Solve for x
    x = 151,838,928.64/13,889.97
  6. Step 6: Final answer
    x = 10,931.55

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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.