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Finding the Fourth Proportional to 12,663.60, 18,998.40 and 8,973.12

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Solution

The fourth proportional to 12,663.60, 18,998.40 and 8,973.12 is: 13,461.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,663.60 : 18,998.40 = 8,973.12 : x
  2. Step 2: Convert to fraction form
    12,663.60/18,998.40 = 8,973.12/x
  3. Step 3: Cross multiply
    12,663.60x = 18,998.40 × 8,973.12
  4. Step 4: Simplify right side
    12,663.60x = 170,474,923.01
  5. Step 5: Solve for x
    x = 170,474,923.01/12,663.60
  6. Step 6: Final answer
    x = 13,461.81

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.