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Finding the Fourth Proportional to 12,903.60, 19,369.80 and 12,057.60

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Solution

The fourth proportional to 12,903.60, 19,369.80 and 12,057.60 is: 18,099.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,903.60 : 19,369.80 = 12,057.60 : x
  2. Step 2: Convert to fraction form
    12,903.60/19,369.80 = 12,057.60/x
  3. Step 3: Cross multiply
    12,903.60x = 19,369.80 × 12,057.60
  4. Step 4: Simplify right side
    12,903.60x = 233,553,300.48
  5. Step 5: Solve for x
    x = 233,553,300.48/12,903.60
  6. Step 6: Final answer
    x = 18,099.86

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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.