Home / 11,240.67-15,525.93-8,420.66

Finding the Fourth Proportional to 11,240.67, 15,525.93 and 8,420.66

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Solution

The fourth proportional to 11,240.67, 15,525.93 and 8,420.66 is: 11,630.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,240.67 : 15,525.93 = 8,420.66 : x
  2. Step 2: Convert to fraction form
    11,240.67/15,525.93 = 8,420.66/x
  3. Step 3: Cross multiply
    11,240.67x = 15,525.93 × 8,420.66
  4. Step 4: Simplify right side
    11,240.67x = 130,738,542.52
  5. Step 5: Solve for x
    x = 130,738,542.52/11,240.67
  6. Step 6: Final answer
    x = 11,630.85

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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.