Home / 28,182.72-38,918-18,134.66

Finding the Fourth Proportional to 28,182.72, 38,918 and 18,134.66

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Solution

The fourth proportional to 28,182.72, 38,918 and 18,134.66 is: 25,042.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,182.72 : 38,918 = 18,134.66 : x
  2. Step 2: Convert to fraction form
    28,182.72/38,918 = 18,134.66/x
  3. Step 3: Cross multiply
    28,182.72x = 38,918 × 18,134.66
  4. Step 4: Simplify right side
    28,182.72x = 705,764,697.88
  5. Step 5: Solve for x
    x = 705,764,697.88/28,182.72
  6. Step 6: Final answer
    x = 25,042.46

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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.