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Finding the Fourth Proportional to 15,163.68, 20,925.93 and 8,791.53

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Solution

The fourth proportional to 15,163.68, 20,925.93 and 8,791.53 is: 12,132.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,163.68 : 20,925.93 = 8,791.53 : x
  2. Step 2: Convert to fraction form
    15,163.68/20,925.93 = 8,791.53/x
  3. Step 3: Cross multiply
    15,163.68x = 20,925.93 × 8,791.53
  4. Step 4: Simplify right side
    15,163.68x = 183,970,941.37
  5. Step 5: Solve for x
    x = 183,970,941.37/15,163.68
  6. Step 6: Final answer
    x = 12,132.34

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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.