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Finding the Fourth Proportional to 13,494.93, 20,345.16 and 12,543.58

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Solution

The fourth proportional to 13,494.93, 20,345.16 and 12,543.58 is: 18,910.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,494.93 : 20,345.16 = 12,543.58 : x
  2. Step 2: Convert to fraction form
    13,494.93/20,345.16 = 12,543.58/x
  3. Step 3: Cross multiply
    13,494.93x = 20,345.16 × 12,543.58
  4. Step 4: Simplify right side
    13,494.93x = 255,201,174.75
  5. Step 5: Solve for x
    x = 255,201,174.75/13,494.93
  6. Step 6: Final answer
    x = 18,910.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.