Home / 51,431.05-70,981.42-28,771.30

Finding the Fourth Proportional to 51,431.05, 70,981.42 and 28,771.30

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Solution

The fourth proportional to 51,431.05, 70,981.42 and 28,771.30 is: 39,708.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,431.05 : 70,981.42 = 28,771.30 : x
  2. Step 2: Convert to fraction form
    51,431.05/70,981.42 = 28,771.30/x
  3. Step 3: Cross multiply
    51,431.05x = 70,981.42 × 28,771.30
  4. Step 4: Simplify right side
    51,431.05x = 2,042,227,729.25
  5. Step 5: Solve for x
    x = 2,042,227,729.25/51,431.05
  6. Step 6: Final answer
    x = 39,708.07

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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.