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Finding the Fourth Proportional to 14,689.54, 20,270.74 and 8,559.11

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Solution

The fourth proportional to 14,689.54, 20,270.74 and 8,559.11 is: 11,811.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,689.54 : 20,270.74 = 8,559.11 : x
  2. Step 2: Convert to fraction form
    14,689.54/20,270.74 = 8,559.11/x
  3. Step 3: Cross multiply
    14,689.54x = 20,270.74 × 8,559.11
  4. Step 4: Simplify right side
    14,689.54x = 173,499,370.69
  5. Step 5: Solve for x
    x = 173,499,370.69/14,689.54
  6. Step 6: Final answer
    x = 11,811.08

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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.