Home / 13,979.20-19,289.10-8,009.72

Finding the Fourth Proportional to 13,979.20, 19,289.10 and 8,009.72

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Solution

The fourth proportional to 13,979.20, 19,289.10 and 8,009.72 is: 11,052.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,979.20 : 19,289.10 = 8,009.72 : x
  2. Step 2: Convert to fraction form
    13,979.20/19,289.10 = 8,009.72/x
  3. Step 3: Cross multiply
    13,979.20x = 19,289.10 × 8,009.72
  4. Step 4: Simplify right side
    13,979.20x = 154,500,290.05
  5. Step 5: Solve for x
    x = 154,500,290.05/13,979.20
  6. Step 6: Final answer
    x = 11,052.16

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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.