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Finding the Fourth Proportional to 13,656.01, 20,487.86 and 12,354.74

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Solution

The fourth proportional to 13,656.01, 20,487.86 and 12,354.74 is: 18,535.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,656.01 : 20,487.86 = 12,354.74 : x
  2. Step 2: Convert to fraction form
    13,656.01/20,487.86 = 12,354.74/x
  3. Step 3: Cross multiply
    13,656.01x = 20,487.86 × 12,354.74
  4. Step 4: Simplify right side
    13,656.01x = 253,122,121.68
  5. Step 5: Solve for x
    x = 253,122,121.68/13,656.01
  6. Step 6: Final answer
    x = 18,535.59

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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.