Home / 19,123.20-28,670.40-8,020.80

Finding the Fourth Proportional to 19,123.20, 28,670.40 and 8,020.80

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Solution

The fourth proportional to 19,123.20, 28,670.40 and 8,020.80 is: 12,025.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,123.20 : 28,670.40 = 8,020.80 : x
  2. Step 2: Convert to fraction form
    19,123.20/28,670.40 = 8,020.80/x
  3. Step 3: Cross multiply
    19,123.20x = 28,670.40 × 8,020.80
  4. Step 4: Simplify right side
    19,123.20x = 229,959,544.32
  5. Step 5: Solve for x
    x = 229,959,544.32/19,123.20
  6. Step 6: Final answer
    x = 12,025.16

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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.