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Finding the Fourth Proportional to 13,709.03, 18,899.64 and 8,670.74

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Solution

The fourth proportional to 13,709.03, 18,899.64 and 8,670.74 is: 11,953.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,709.03 : 18,899.64 = 8,670.74 : x
  2. Step 2: Convert to fraction form
    13,709.03/18,899.64 = 8,670.74/x
  3. Step 3: Cross multiply
    13,709.03x = 18,899.64 × 8,670.74
  4. Step 4: Simplify right side
    13,709.03x = 163,873,770.04
  5. Step 5: Solve for x
    x = 163,873,770.04/13,709.03
  6. Step 6: Final answer
    x = 11,953.71

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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.