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Finding the Fourth Proportional to 15,638.11, 21,578.54 and 8,923.32

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Solution

The fourth proportional to 15,638.11, 21,578.54 and 8,923.32 is: 12,313.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,638.11 : 21,578.54 = 8,923.32 : x
  2. Step 2: Convert to fraction form
    15,638.11/21,578.54 = 8,923.32/x
  3. Step 3: Cross multiply
    15,638.11x = 21,578.54 × 8,923.32
  4. Step 4: Simplify right side
    15,638.11x = 192,552,172.94
  5. Step 5: Solve for x
    x = 192,552,172.94/15,638.11
  6. Step 6: Final answer
    x = 12,313.01

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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.