Home / 21,151.45-31,740.34-19,180.64

Finding the Fourth Proportional to 21,151.45, 31,740.34 and 19,180.64

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Solution

The fourth proportional to 21,151.45, 31,740.34 and 19,180.64 is: 28,782.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,151.45 : 31,740.34 = 19,180.64 : x
  2. Step 2: Convert to fraction form
    21,151.45/31,740.34 = 19,180.64/x
  3. Step 3: Cross multiply
    21,151.45x = 31,740.34 × 19,180.64
  4. Step 4: Simplify right side
    21,151.45x = 608,800,035.02
  5. Step 5: Solve for x
    x = 608,800,035.02/21,151.45
  6. Step 6: Final answer
    x = 28,782.90

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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.