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Finding the Fourth Proportional to 15,048.70, 20,767.08 and 8,424.70

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Solution

The fourth proportional to 15,048.70, 20,767.08 and 8,424.70 is: 11,626.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,048.70 : 20,767.08 = 8,424.70 : x
  2. Step 2: Convert to fraction form
    15,048.70/20,767.08 = 8,424.70/x
  3. Step 3: Cross multiply
    15,048.70x = 20,767.08 × 8,424.70
  4. Step 4: Simplify right side
    15,048.70x = 174,956,418.88
  5. Step 5: Solve for x
    x = 174,956,418.88/15,048.70
  6. Step 6: Final answer
    x = 11,626.02

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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.