Home / 51,189.20-70,638.24-28,218.28

Finding the Fourth Proportional to 51,189.20, 70,638.24 and 28,218.28

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Solution

The fourth proportional to 51,189.20, 70,638.24 and 28,218.28 is: 38,939.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,189.20 : 70,638.24 = 28,218.28 : x
  2. Step 2: Convert to fraction form
    51,189.20/70,638.24 = 28,218.28/x
  3. Step 3: Cross multiply
    51,189.20x = 70,638.24 × 28,218.28
  4. Step 4: Simplify right side
    51,189.20x = 1,993,289,635.03
  5. Step 5: Solve for x
    x = 1,993,289,635.03/51,189.20
  6. Step 6: Final answer
    x = 38,939.65

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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.