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Finding the Fourth Proportional to 12,592.80, 18,903.60 and 7,401.60

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Solution

The fourth proportional to 12,592.80, 18,903.60 and 7,401.60 is: 11,110.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,592.80 : 18,903.60 = 7,401.60 : x
  2. Step 2: Convert to fraction form
    12,592.80/18,903.60 = 7,401.60/x
  3. Step 3: Cross multiply
    12,592.80x = 18,903.60 × 7,401.60
  4. Step 4: Simplify right side
    12,592.80x = 139,916,885.76
  5. Step 5: Solve for x
    x = 139,916,885.76/12,592.80
  6. Step 6: Final answer
    x = 11,110.86

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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.