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Finding the Fourth Proportional to 15,167.67, 20,918.30 and 9,860.55

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Solution

The fourth proportional to 15,167.67, 20,918.30 and 9,860.55 is: 13,599.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,167.67 : 20,918.30 = 9,860.55 : x
  2. Step 2: Convert to fraction form
    15,167.67/20,918.30 = 9,860.55/x
  3. Step 3: Cross multiply
    15,167.67x = 20,918.30 × 9,860.55
  4. Step 4: Simplify right side
    15,167.67x = 206,265,893.76
  5. Step 5: Solve for x
    x = 206,265,893.76/15,167.67
  6. Step 6: Final answer
    x = 13,599.05

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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.