Home / 13,889.07-19,165.41-7,920.18

Finding the Fourth Proportional to 13,889.07, 19,165.41 and 7,920.18

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Solution

The fourth proportional to 13,889.07, 19,165.41 and 7,920.18 is: 10,928.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,889.07 : 19,165.41 = 7,920.18 : x
  2. Step 2: Convert to fraction form
    13,889.07/19,165.41 = 7,920.18/x
  3. Step 3: Cross multiply
    13,889.07x = 19,165.41 × 7,920.18
  4. Step 4: Simplify right side
    13,889.07x = 151,793,496.97
  5. Step 5: Solve for x
    x = 151,793,496.97/13,889.07
  6. Step 6: Final answer
    x = 10,928.99

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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.