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Finding the Fourth Proportional to 19,008.60, 28,512.90 and 13,103.70

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Solution

The fourth proportional to 19,008.60, 28,512.90 and 13,103.70 is: 19,655.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,008.60 : 28,512.90 = 13,103.70 : x
  2. Step 2: Convert to fraction form
    19,008.60/28,512.90 = 13,103.70/x
  3. Step 3: Cross multiply
    19,008.60x = 28,512.90 × 13,103.70
  4. Step 4: Simplify right side
    19,008.60x = 373,624,487.73
  5. Step 5: Solve for x
    x = 373,624,487.73/19,008.60
  6. Step 6: Final answer
    x = 19,655.55

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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.