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Finding the Fourth Proportional to 15,356.80, 23,002.80 and 12,764.80

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Solution

The fourth proportional to 15,356.80, 23,002.80 and 12,764.80 is: 19,120.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,356.80 : 23,002.80 = 12,764.80 : x
  2. Step 2: Convert to fraction form
    15,356.80/23,002.80 = 12,764.80/x
  3. Step 3: Cross multiply
    15,356.80x = 23,002.80 × 12,764.80
  4. Step 4: Simplify right side
    15,356.80x = 293,626,141.44
  5. Step 5: Solve for x
    x = 293,626,141.44/15,356.80
  6. Step 6: Final answer
    x = 19,120.27

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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.