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Finding the Fourth Proportional to 13,630.16, 18,810.16 and 7,968.56

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Solution

The fourth proportional to 13,630.16, 18,810.16 and 7,968.56 is: 10,996.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,630.16 : 18,810.16 = 7,968.56 : x
  2. Step 2: Convert to fraction form
    13,630.16/18,810.16 = 7,968.56/x
  3. Step 3: Cross multiply
    13,630.16x = 18,810.16 × 7,968.56
  4. Step 4: Simplify right side
    13,630.16x = 149,889,888.57
  5. Step 5: Solve for x
    x = 149,889,888.57/13,630.16
  6. Step 6: Final answer
    x = 10,996.93

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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.