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Finding the Fourth Proportional to 15,069.15, 20,795.43 and 8,354.86

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Solution

The fourth proportional to 15,069.15, 20,795.43 and 8,354.86 is: 11,529.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,069.15 : 20,795.43 = 8,354.86 : x
  2. Step 2: Convert to fraction form
    15,069.15/20,795.43 = 8,354.86/x
  3. Step 3: Cross multiply
    15,069.15x = 20,795.43 × 8,354.86
  4. Step 4: Simplify right side
    15,069.15x = 173,742,885.63
  5. Step 5: Solve for x
    x = 173,742,885.63/15,069.15
  6. Step 6: Final answer
    x = 11,529.71

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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.