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Finding the Fourth Proportional to 14,815.86, 20,445.90 and 8,101.51

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Solution

The fourth proportional to 14,815.86, 20,445.90 and 8,101.51 is: 11,180.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,815.86 : 20,445.90 = 8,101.51 : x
  2. Step 2: Convert to fraction form
    14,815.86/20,445.90 = 8,101.51/x
  3. Step 3: Cross multiply
    14,815.86x = 20,445.90 × 8,101.51
  4. Step 4: Simplify right side
    14,815.86x = 165,642,663.31
  5. Step 5: Solve for x
    x = 165,642,663.31/14,815.86
  6. Step 6: Final answer
    x = 11,180.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.