Home / 15,128.03-20,878.53-9,161.77

Finding the Fourth Proportional to 15,128.03, 20,878.53 and 9,161.77

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Solution

The fourth proportional to 15,128.03, 20,878.53 and 9,161.77 is: 12,644.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,128.03 : 20,878.53 = 9,161.77 : x
  2. Step 2: Convert to fraction form
    15,128.03/20,878.53 = 9,161.77/x
  3. Step 3: Cross multiply
    15,128.03x = 20,878.53 × 9,161.77
  4. Step 4: Simplify right side
    15,128.03x = 191,284,289.80
  5. Step 5: Solve for x
    x = 191,284,289.80/15,128.03
  6. Step 6: Final answer
    x = 12,644.36

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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.