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Finding the Fourth Proportional to 14,011.68, 20,980.44 and 8,457.60

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Solution

The fourth proportional to 14,011.68, 20,980.44 and 8,457.60 is: 12,664.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,011.68 : 20,980.44 = 8,457.60 : x
  2. Step 2: Convert to fraction form
    14,011.68/20,980.44 = 8,457.60/x
  3. Step 3: Cross multiply
    14,011.68x = 20,980.44 × 8,457.60
  4. Step 4: Simplify right side
    14,011.68x = 177,444,169.34
  5. Step 5: Solve for x
    x = 177,444,169.34/14,011.68
  6. Step 6: Final answer
    x = 12,664.02

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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.