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Finding the Fourth Proportional to 12,881.34, 17,771.13 and 7,567.74

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Solution

The fourth proportional to 12,881.34, 17,771.13 and 7,567.74 is: 10,440.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,881.34 : 17,771.13 = 7,567.74 : x
  2. Step 2: Convert to fraction form
    12,881.34/17,771.13 = 7,567.74/x
  3. Step 3: Cross multiply
    12,881.34x = 17,771.13 × 7,567.74
  4. Step 4: Simplify right side
    12,881.34x = 134,487,291.35
  5. Step 5: Solve for x
    x = 134,487,291.35/12,881.34
  6. Step 6: Final answer
    x = 10,440.47

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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.