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Finding the Fourth Proportional to 13,953.90, 20,904.12 and 13,484.91

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Solution

The fourth proportional to 13,953.90, 20,904.12 and 13,484.91 is: 20,201.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,953.90 : 20,904.12 = 13,484.91 : x
  2. Step 2: Convert to fraction form
    13,953.90/20,904.12 = 13,484.91/x
  3. Step 3: Cross multiply
    13,953.90x = 20,904.12 × 13,484.91
  4. Step 4: Simplify right side
    13,953.90x = 281,890,176.83
  5. Step 5: Solve for x
    x = 281,890,176.83/13,953.90
  6. Step 6: Final answer
    x = 20,201.53

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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.