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Finding the Fourth Proportional to 13,433.99, 18,548.14 and 8,400.65

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Solution

The fourth proportional to 13,433.99, 18,548.14 and 8,400.65 is: 11,598.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,433.99 : 18,548.14 = 8,400.65 : x
  2. Step 2: Convert to fraction form
    13,433.99/18,548.14 = 8,400.65/x
  3. Step 3: Cross multiply
    13,433.99x = 18,548.14 × 8,400.65
  4. Step 4: Simplify right side
    13,433.99x = 155,816,432.29
  5. Step 5: Solve for x
    x = 155,816,432.29/13,433.99
  6. Step 6: Final answer
    x = 11,598.67

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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.