Home / 13,979.10-19,289.71-7,928.11

Finding the Fourth Proportional to 13,979.10, 19,289.71 and 7,928.11

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Solution

The fourth proportional to 13,979.10, 19,289.71 and 7,928.11 is: 10,939.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.10 : 19,289.71 = 7,928.11 : x
  2. Step 2: Convert to fraction form
    13,979.10/19,289.71 = 7,928.11/x
  3. Step 3: Cross multiply
    13,979.10x = 19,289.71 × 7,928.11
  4. Step 4: Simplify right side
    13,979.10x = 152,930,988.75
  5. Step 5: Solve for x
    x = 152,930,988.75/13,979.10
  6. Step 6: Final answer
    x = 10,939.98

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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.