Home / 20,520.52-30,783.72-6,475.80

Finding the Fourth Proportional to 20,520.52, 30,783.72 and 6,475.80

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Solution

The fourth proportional to 20,520.52, 30,783.72 and 6,475.80 is: 9,714.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,520.52 : 30,783.72 = 6,475.80 : x
  2. Step 2: Convert to fraction form
    20,520.52/30,783.72 = 6,475.80/x
  3. Step 3: Cross multiply
    20,520.52x = 30,783.72 × 6,475.80
  4. Step 4: Simplify right side
    20,520.52x = 199,349,213.98
  5. Step 5: Solve for x
    x = 199,349,213.98/20,520.52
  6. Step 6: Final answer
    x = 9,714.63

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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.