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Finding the Fourth Proportional to 20,407.91, 30,623.76 and 8,560.67

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Solution

The fourth proportional to 20,407.91, 30,623.76 and 8,560.67 is: 12,845.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,407.91 : 30,623.76 = 8,560.67 : x
  2. Step 2: Convert to fraction form
    20,407.91/30,623.76 = 8,560.67/x
  3. Step 3: Cross multiply
    20,407.91x = 30,623.76 × 8,560.67
  4. Step 4: Simplify right side
    20,407.91x = 262,159,750.40
  5. Step 5: Solve for x
    x = 262,159,750.40/20,407.91
  6. Step 6: Final answer
    x = 12,845.99

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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.