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Finding the Fourth Proportional to 15,072.40, 22,619.40 and 8,491.60

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Solution

The fourth proportional to 15,072.40, 22,619.40 and 8,491.60 is: 12,743.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,072.40 : 22,619.40 = 8,491.60 : x
  2. Step 2: Convert to fraction form
    15,072.40/22,619.40 = 8,491.60/x
  3. Step 3: Cross multiply
    15,072.40x = 22,619.40 × 8,491.60
  4. Step 4: Simplify right side
    15,072.40x = 192,074,897.04
  5. Step 5: Solve for x
    x = 192,074,897.04/15,072.40
  6. Step 6: Final answer
    x = 12,743.48

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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.