Home / 15,158.57-20,918.86-8,786.39

Finding the Fourth Proportional to 15,158.57, 20,918.86 and 8,786.39

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Solution

The fourth proportional to 15,158.57, 20,918.86 and 8,786.39 is: 12,125.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,158.57 : 20,918.86 = 8,786.39 : x
  2. Step 2: Convert to fraction form
    15,158.57/20,918.86 = 8,786.39/x
  3. Step 3: Cross multiply
    15,158.57x = 20,918.86 × 8,786.39
  4. Step 4: Simplify right side
    15,158.57x = 183,801,292.65
  5. Step 5: Solve for x
    x = 183,801,292.65/15,158.57
  6. Step 6: Final answer
    x = 12,125.24

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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.