Home / 20,650.63-28,498.22-11,219.20

Finding the Fourth Proportional to 20,650.63, 28,498.22 and 11,219.20

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Solution

The fourth proportional to 20,650.63, 28,498.22 and 11,219.20 is: 15,482.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,650.63 : 28,498.22 = 11,219.20 : x
  2. Step 2: Convert to fraction form
    20,650.63/28,498.22 = 11,219.20/x
  3. Step 3: Cross multiply
    20,650.63x = 28,498.22 × 11,219.20
  4. Step 4: Simplify right side
    20,650.63x = 319,727,229.82
  5. Step 5: Solve for x
    x = 319,727,229.82/20,650.63
  6. Step 6: Final answer
    x = 15,482.69

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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.