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Finding the Fourth Proportional to 12,972.60, 17,892.63 and 9,615.56

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Solution

The fourth proportional to 12,972.60, 17,892.63 and 9,615.56 is: 13,262.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,972.60 : 17,892.63 = 9,615.56 : x
  2. Step 2: Convert to fraction form
    12,972.60/17,892.63 = 9,615.56/x
  3. Step 3: Cross multiply
    12,972.60x = 17,892.63 × 9,615.56
  4. Step 4: Simplify right side
    12,972.60x = 172,047,567.86
  5. Step 5: Solve for x
    x = 172,047,567.86/12,972.60
  6. Step 6: Final answer
    x = 13,262.38

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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.