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Finding the Fourth Proportional to 14,184.60, 21,276.90 and 12,456.60

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Solution

The fourth proportional to 14,184.60, 21,276.90 and 12,456.60 is: 18,684.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,184.60 : 21,276.90 = 12,456.60 : x
  2. Step 2: Convert to fraction form
    14,184.60/21,276.90 = 12,456.60/x
  3. Step 3: Cross multiply
    14,184.60x = 21,276.90 × 12,456.60
  4. Step 4: Simplify right side
    14,184.60x = 265,037,832.54
  5. Step 5: Solve for x
    x = 265,037,832.54/14,184.60
  6. Step 6: Final answer
    x = 18,684.90

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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.