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Finding the Fourth Proportional to 15,636.53, 21,578.58 and 8,923.05

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Solution

The fourth proportional to 15,636.53, 21,578.58 and 8,923.05 is: 12,313.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,636.53 : 21,578.58 = 8,923.05 : x
  2. Step 2: Convert to fraction form
    15,636.53/21,578.58 = 8,923.05/x
  3. Step 3: Cross multiply
    15,636.53x = 21,578.58 × 8,923.05
  4. Step 4: Simplify right side
    15,636.53x = 192,546,748.27
  5. Step 5: Solve for x
    x = 192,546,748.27/15,636.53
  6. Step 6: Final answer
    x = 12,313.91

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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.