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Finding the Fourth Proportional to 9,729, 13,426.34 and 5,313

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Solution

The fourth proportional to 9,729, 13,426.34 and 5,313 is: 7,332.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,729 : 13,426.34 = 5,313 : x
  2. Step 2: Convert to fraction form
    9,729/13,426.34 = 5,313/x
  3. Step 3: Cross multiply
    9,729x = 13,426.34 × 5,313
  4. Step 4: Simplify right side
    9,729x = 71,334,144.42
  5. Step 5: Solve for x
    x = 71,334,144.42/9,729
  6. Step 6: Final answer
    x = 7,332.11

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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.