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Finding the Fourth Proportional to 14,589.99, 20,129.51 and 8,623.67

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Solution

The fourth proportional to 14,589.99, 20,129.51 and 8,623.67 is: 11,897.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,589.99 : 20,129.51 = 8,623.67 : x
  2. Step 2: Convert to fraction form
    14,589.99/20,129.51 = 8,623.67/x
  3. Step 3: Cross multiply
    14,589.99x = 20,129.51 × 8,623.67
  4. Step 4: Simplify right side
    14,589.99x = 173,590,172.41
  5. Step 5: Solve for x
    x = 173,590,172.41/14,589.99
  6. Step 6: Final answer
    x = 11,897.90

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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.