Home / 20,384.54-28,118.76-12,818.90

Finding the Fourth Proportional to 20,384.54, 28,118.76 and 12,818.90

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Solution

The fourth proportional to 20,384.54, 28,118.76 and 12,818.90 is: 17,682.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.54 : 28,118.76 = 12,818.90 : x
  2. Step 2: Convert to fraction form
    20,384.54/28,118.76 = 12,818.90/x
  3. Step 3: Cross multiply
    20,384.54x = 28,118.76 × 12,818.90
  4. Step 4: Simplify right side
    20,384.54x = 360,451,572.56
  5. Step 5: Solve for x
    x = 360,451,572.56/20,384.54
  6. Step 6: Final answer
    x = 17,682.60

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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.