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Finding the Fourth Proportional to 12,602.81, 18,918.15 and 10,652.60

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Solution

The fourth proportional to 12,602.81, 18,918.15 and 10,652.60 is: 15,990.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,602.81 : 18,918.15 = 10,652.60 : x
  2. Step 2: Convert to fraction form
    12,602.81/18,918.15 = 10,652.60/x
  3. Step 3: Cross multiply
    12,602.81x = 18,918.15 × 10,652.60
  4. Step 4: Simplify right side
    12,602.81x = 201,527,484.69
  5. Step 5: Solve for x
    x = 201,527,484.69/12,602.81
  6. Step 6: Final answer
    x = 15,990.68

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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.