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Finding the Fourth Proportional to 13,370.96, 18,451.96 and 7,402.80

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Solution

The fourth proportional to 13,370.96, 18,451.96 and 7,402.80 is: 10,215.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,370.96 : 18,451.96 = 7,402.80 : x
  2. Step 2: Convert to fraction form
    13,370.96/18,451.96 = 7,402.80/x
  3. Step 3: Cross multiply
    13,370.96x = 18,451.96 × 7,402.80
  4. Step 4: Simplify right side
    13,370.96x = 136,596,169.49
  5. Step 5: Solve for x
    x = 136,596,169.49/13,370.96
  6. Step 6: Final answer
    x = 10,215.88

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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.