Home / 20,650.80-28,498.26-11,219.40

Finding the Fourth Proportional to 20,650.80, 28,498.26 and 11,219.40

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Solution

The fourth proportional to 20,650.80, 28,498.26 and 11,219.40 is: 15,482.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,650.80 : 28,498.26 = 11,219.40 : x
  2. Step 2: Convert to fraction form
    20,650.80/28,498.26 = 11,219.40/x
  3. Step 3: Cross multiply
    20,650.80x = 28,498.26 × 11,219.40
  4. Step 4: Simplify right side
    20,650.80x = 319,733,378.24
  5. Step 5: Solve for x
    x = 319,733,378.24/20,650.80
  6. Step 6: Final answer
    x = 15,482.86

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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.