Home / 21,271.66-31,909.67-8,135.08

Finding the Fourth Proportional to 21,271.66, 31,909.67 and 8,135.08

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Solution

The fourth proportional to 21,271.66, 31,909.67 and 8,135.08 is: 12,203.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,271.66 : 31,909.67 = 8,135.08 : x
  2. Step 2: Convert to fraction form
    21,271.66/31,909.67 = 8,135.08/x
  3. Step 3: Cross multiply
    21,271.66x = 31,909.67 × 8,135.08
  4. Step 4: Simplify right side
    21,271.66x = 259,587,738.56
  5. Step 5: Solve for x
    x = 259,587,738.56/21,271.66
  6. Step 6: Final answer
    x = 12,203.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.