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Finding the Fourth Proportional to 14,978.08, 20,674.02 and 8,689.24

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Solution

The fourth proportional to 14,978.08, 20,674.02 and 8,689.24 is: 11,993.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,978.08 : 20,674.02 = 8,689.24 : x
  2. Step 2: Convert to fraction form
    14,978.08/20,674.02 = 8,689.24/x
  3. Step 3: Cross multiply
    14,978.08x = 20,674.02 × 8,689.24
  4. Step 4: Simplify right side
    14,978.08x = 179,641,521.54
  5. Step 5: Solve for x
    x = 179,641,521.54/14,978.08
  6. Step 6: Final answer
    x = 11,993.63

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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.