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Finding the Fourth Proportional to 9,266.40, 12,791.52 and 5,909.40

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Solution

The fourth proportional to 9,266.40, 12,791.52 and 5,909.40 is: 8,157.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,266.40 : 12,791.52 = 5,909.40 : x
  2. Step 2: Convert to fraction form
    9,266.40/12,791.52 = 5,909.40/x
  3. Step 3: Cross multiply
    9,266.40x = 12,791.52 × 5,909.40
  4. Step 4: Simplify right side
    9,266.40x = 75,590,208.29
  5. Step 5: Solve for x
    x = 75,590,208.29/9,266.40
  6. Step 6: Final answer
    x = 8,157.45

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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.