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Finding the Fourth Proportional to 13,657.01, 20,489.36 and 12,355.74

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Solution

The fourth proportional to 13,657.01, 20,489.36 and 12,355.74 is: 18,537.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,657.01 : 20,489.36 = 12,355.74 : x
  2. Step 2: Convert to fraction form
    13,657.01/20,489.36 = 12,355.74/x
  3. Step 3: Cross multiply
    13,657.01x = 20,489.36 × 12,355.74
  4. Step 4: Simplify right side
    13,657.01x = 253,161,204.93
  5. Step 5: Solve for x
    x = 253,161,204.93/13,657.01
  6. Step 6: Final answer
    x = 18,537.09

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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.