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Finding the Fourth Proportional to 13,687.67, 20,518.95 and 9,000.20

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Solution

The fourth proportional to 13,687.67, 20,518.95 and 9,000.20 is: 13,492.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,687.67 : 20,518.95 = 9,000.20 : x
  2. Step 2: Convert to fraction form
    13,687.67/20,518.95 = 9,000.20/x
  3. Step 3: Cross multiply
    13,687.67x = 20,518.95 × 9,000.20
  4. Step 4: Simplify right side
    13,687.67x = 184,674,653.79
  5. Step 5: Solve for x
    x = 184,674,653.79/13,687.67
  6. Step 6: Final answer
    x = 13,492.04

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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.