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Finding the Fourth Proportional to 14,694.68, 20,278.86 and 7,980.39

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Solution

The fourth proportional to 14,694.68, 20,278.86 and 7,980.39 is: 11,013.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,694.68 : 20,278.86 = 7,980.39 : x
  2. Step 2: Convert to fraction form
    14,694.68/20,278.86 = 7,980.39/x
  3. Step 3: Cross multiply
    14,694.68x = 20,278.86 × 7,980.39
  4. Step 4: Simplify right side
    14,694.68x = 161,833,181.63
  5. Step 5: Solve for x
    x = 161,833,181.63/14,694.68
  6. Step 6: Final answer
    x = 11,013.04

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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.