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Finding the Fourth Proportional to 16,686.20, 25,014.90 and 8,478.20

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Solution

The fourth proportional to 16,686.20, 25,014.90 and 8,478.20 is: 12,709.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,686.20 : 25,014.90 = 8,478.20 : x
  2. Step 2: Convert to fraction form
    16,686.20/25,014.90 = 8,478.20/x
  3. Step 3: Cross multiply
    16,686.20x = 25,014.90 × 8,478.20
  4. Step 4: Simplify right side
    16,686.20x = 212,081,325.18
  5. Step 5: Solve for x
    x = 212,081,325.18/16,686.20
  6. Step 6: Final answer
    x = 12,709.98

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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.