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Finding the Fourth Proportional to 12,860.79, 17,748.72 and 7,196.06

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Solution

The fourth proportional to 12,860.79, 17,748.72 and 7,196.06 is: 9,931.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,860.79 : 17,748.72 = 7,196.06 : x
  2. Step 2: Convert to fraction form
    12,860.79/17,748.72 = 7,196.06/x
  3. Step 3: Cross multiply
    12,860.79x = 17,748.72 × 7,196.06
  4. Step 4: Simplify right side
    12,860.79x = 127,720,765.30
  5. Step 5: Solve for x
    x = 127,720,765.30/12,860.79
  6. Step 6: Final answer
    x = 9,931.02

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These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.