Home / 13,984.65-20,990.16-5,108.58

Finding the Fourth Proportional to 13,984.65, 20,990.16 and 5,108.58

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Solution

The fourth proportional to 13,984.65, 20,990.16 and 5,108.58 is: 7,667.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,984.65 : 20,990.16 = 5,108.58 : x
  2. Step 2: Convert to fraction form
    13,984.65/20,990.16 = 5,108.58/x
  3. Step 3: Cross multiply
    13,984.65x = 20,990.16 × 5,108.58
  4. Step 4: Simplify right side
    13,984.65x = 107,229,911.57
  5. Step 5: Solve for x
    x = 107,229,911.57/13,984.65
  6. Step 6: Final answer
    x = 7,667.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.