Home / 51,021.57-70,405.71-28,358.78

Finding the Fourth Proportional to 51,021.57, 70,405.71 and 28,358.78

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Solution

The fourth proportional to 51,021.57, 70,405.71 and 28,358.78 is: 39,132.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,021.57 : 70,405.71 = 28,358.78 : x
  2. Step 2: Convert to fraction form
    51,021.57/70,405.71 = 28,358.78/x
  3. Step 3: Cross multiply
    51,021.57x = 70,405.71 × 28,358.78
  4. Step 4: Simplify right side
    51,021.57x = 1,996,620,040.63
  5. Step 5: Solve for x
    x = 1,996,620,040.63/51,021.57
  6. Step 6: Final answer
    x = 39,132.86

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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.