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Finding the Fourth Proportional to 9,980.63, 14,965.65 and 4,431.56

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Solution

The fourth proportional to 9,980.63, 14,965.65 and 4,431.56 is: 6,644.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,980.63 : 14,965.65 = 4,431.56 : x
  2. Step 2: Convert to fraction form
    9,980.63/14,965.65 = 4,431.56/x
  3. Step 3: Cross multiply
    9,980.63x = 14,965.65 × 4,431.56
  4. Step 4: Simplify right side
    9,980.63x = 66,321,101.09
  5. Step 5: Solve for x
    x = 66,321,101.09/9,980.63
  6. Step 6: Final answer
    x = 6,644.98

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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.