Home / 20,764.55-28,668.84-12,818.45

Finding the Fourth Proportional to 20,764.55, 28,668.84 and 12,818.45

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Solution

The fourth proportional to 20,764.55, 28,668.84 and 12,818.45 is: 17,697.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,764.55 : 28,668.84 = 12,818.45 : x
  2. Step 2: Convert to fraction form
    20,764.55/28,668.84 = 12,818.45/x
  3. Step 3: Cross multiply
    20,764.55x = 28,668.84 × 12,818.45
  4. Step 4: Simplify right side
    20,764.55x = 367,490,115.70
  5. Step 5: Solve for x
    x = 367,490,115.70/20,764.55
  6. Step 6: Final answer
    x = 17,697.95

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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.