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Finding the Fourth Proportional to 15,418.72, 23,128.08 and 7,619.68

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Solution

The fourth proportional to 15,418.72, 23,128.08 and 7,619.68 is: 11,429.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,418.72 : 23,128.08 = 7,619.68 : x
  2. Step 2: Convert to fraction form
    15,418.72/23,128.08 = 7,619.68/x
  3. Step 3: Cross multiply
    15,418.72x = 23,128.08 × 7,619.68
  4. Step 4: Simplify right side
    15,418.72x = 176,228,568.61
  5. Step 5: Solve for x
    x = 176,228,568.61/15,418.72
  6. Step 6: Final answer
    x = 11,429.52

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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.