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Finding the Fourth Proportional to 12,938.34, 17,861.46 and 9,888.60

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Solution

The fourth proportional to 12,938.34, 17,861.46 and 9,888.60 is: 13,651.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,938.34 : 17,861.46 = 9,888.60 : x
  2. Step 2: Convert to fraction form
    12,938.34/17,861.46 = 9,888.60/x
  3. Step 3: Cross multiply
    12,938.34x = 17,861.46 × 9,888.60
  4. Step 4: Simplify right side
    12,938.34x = 176,624,833.36
  5. Step 5: Solve for x
    x = 176,624,833.36/12,938.34
  6. Step 6: Final answer
    x = 13,651.27

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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.