Home / 20,770.64-31,136.77-8,287.63

Finding the Fourth Proportional to 20,770.64, 31,136.77 and 8,287.63

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Solution

The fourth proportional to 20,770.64, 31,136.77 and 8,287.63 is: 12,423.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,770.64 : 31,136.77 = 8,287.63 : x
  2. Step 2: Convert to fraction form
    20,770.64/31,136.77 = 8,287.63/x
  3. Step 3: Cross multiply
    20,770.64x = 31,136.77 × 8,287.63
  4. Step 4: Simplify right side
    20,770.64x = 258,050,029.16
  5. Step 5: Solve for x
    x = 258,050,029.16/20,770.64
  6. Step 6: Final answer
    x = 12,423.79

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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.