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Finding the Fourth Proportional to 13,154.60, 19,703.10 and 12,866.60

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Solution

The fourth proportional to 13,154.60, 19,703.10 and 12,866.60 is: 19,271.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,154.60 : 19,703.10 = 12,866.60 : x
  2. Step 2: Convert to fraction form
    13,154.60/19,703.10 = 12,866.60/x
  3. Step 3: Cross multiply
    13,154.60x = 19,703.10 × 12,866.60
  4. Step 4: Simplify right side
    13,154.60x = 253,511,906.46
  5. Step 5: Solve for x
    x = 253,511,906.46/13,154.60
  6. Step 6: Final answer
    x = 19,271.73

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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.