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Finding the Fourth Proportional to 13,693.93, 18,908.45 and 8,916.15

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Solution

The fourth proportional to 13,693.93, 18,908.45 and 8,916.15 is: 12,311.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,693.93 : 18,908.45 = 8,916.15 : x
  2. Step 2: Convert to fraction form
    13,693.93/18,908.45 = 8,916.15/x
  3. Step 3: Cross multiply
    13,693.93x = 18,908.45 × 8,916.15
  4. Step 4: Simplify right side
    13,693.93x = 168,590,576.47
  5. Step 5: Solve for x
    x = 168,590,576.47/13,693.93
  6. Step 6: Final answer
    x = 12,311.34

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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.