Home / 15,005.69-20,706.78-8,291.25

Finding the Fourth Proportional to 15,005.69, 20,706.78 and 8,291.25

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Solution

The fourth proportional to 15,005.69, 20,706.78 and 8,291.25 is: 11,441.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,005.69 : 20,706.78 = 8,291.25 : x
  2. Step 2: Convert to fraction form
    15,005.69/20,706.78 = 8,291.25/x
  3. Step 3: Cross multiply
    15,005.69x = 20,706.78 × 8,291.25
  4. Step 4: Simplify right side
    15,005.69x = 171,685,089.68
  5. Step 5: Solve for x
    x = 171,685,089.68/15,005.69
  6. Step 6: Final answer
    x = 11,441.34

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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.