Home / 28,138.35-42,207.63-11,498.43

Finding the Fourth Proportional to 28,138.35, 42,207.63 and 11,498.43

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Solution

The fourth proportional to 28,138.35, 42,207.63 and 11,498.43 is: 17,247.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,138.35 : 42,207.63 = 11,498.43 : x
  2. Step 2: Convert to fraction form
    28,138.35/42,207.63 = 11,498.43/x
  3. Step 3: Cross multiply
    28,138.35x = 42,207.63 × 11,498.43
  4. Step 4: Simplify right side
    28,138.35x = 485,321,479.02
  5. Step 5: Solve for x
    x = 485,321,479.02/28,138.35
  6. Step 6: Final answer
    x = 17,247.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.