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Finding the Fourth Proportional to 13,322.79, 18,385.48 and 7,354.47

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Solution

The fourth proportional to 13,322.79, 18,385.48 and 7,354.47 is: 10,149.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,322.79 : 18,385.48 = 7,354.47 : x
  2. Step 2: Convert to fraction form
    13,322.79/18,385.48 = 7,354.47/x
  3. Step 3: Cross multiply
    13,322.79x = 18,385.48 × 7,354.47
  4. Step 4: Simplify right side
    13,322.79x = 135,215,378.93
  5. Step 5: Solve for x
    x = 135,215,378.93/13,322.79
  6. Step 6: Final answer
    x = 10,149.18

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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.