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Finding the Fourth Proportional to 12,810.60, 19,102.86 and 12,353.76

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Solution

The fourth proportional to 12,810.60, 19,102.86 and 12,353.76 is: 18,421.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,810.60 : 19,102.86 = 12,353.76 : x
  2. Step 2: Convert to fraction form
    12,810.60/19,102.86 = 12,353.76/x
  3. Step 3: Cross multiply
    12,810.60x = 19,102.86 × 12,353.76
  4. Step 4: Simplify right side
    12,810.60x = 235,992,147.75
  5. Step 5: Solve for x
    x = 235,992,147.75/12,810.60
  6. Step 6: Final answer
    x = 18,421.63

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.