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Finding the Fourth Proportional to 13,898.01, 20,854.59 and 7,650.21

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Solution

The fourth proportional to 13,898.01, 20,854.59 and 7,650.21 is: 11,479.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,898.01 : 20,854.59 = 7,650.21 : x
  2. Step 2: Convert to fraction form
    13,898.01/20,854.59 = 7,650.21/x
  3. Step 3: Cross multiply
    13,898.01x = 20,854.59 × 7,650.21
  4. Step 4: Simplify right side
    13,898.01x = 159,541,992.96
  5. Step 5: Solve for x
    x = 159,541,992.96/13,898.01
  6. Step 6: Final answer
    x = 11,479.48

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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.