Home / 25,686.72-35,433.48-20,911.80

Finding the Fourth Proportional to 25,686.72, 35,433.48 and 20,911.80

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Solution

The fourth proportional to 25,686.72, 35,433.48 and 20,911.80 is: 28,846.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,686.72 : 35,433.48 = 20,911.80 : x
  2. Step 2: Convert to fraction form
    25,686.72/35,433.48 = 20,911.80/x
  3. Step 3: Cross multiply
    25,686.72x = 35,433.48 × 20,911.80
  4. Step 4: Simplify right side
    25,686.72x = 740,977,847.06
  5. Step 5: Solve for x
    x = 740,977,847.06/25,686.72
  6. Step 6: Final answer
    x = 28,846.73

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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.