Home / 51,029.78-70,422.54-30,890.30

Finding the Fourth Proportional to 51,029.78, 70,422.54 and 30,890.30

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Solution

The fourth proportional to 51,029.78, 70,422.54 and 30,890.30 is: 42,629.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,029.78 : 70,422.54 = 30,890.30 : x
  2. Step 2: Convert to fraction form
    51,029.78/70,422.54 = 30,890.30/x
  3. Step 3: Cross multiply
    51,029.78x = 70,422.54 × 30,890.30
  4. Step 4: Simplify right side
    51,029.78x = 2,175,373,387.36
  5. Step 5: Solve for x
    x = 2,175,373,387.36/51,029.78
  6. Step 6: Final answer
    x = 42,629.49

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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.