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Finding the Fourth Proportional to 15,148.67, 20,906.18 and 9,180.93

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Solution

The fourth proportional to 15,148.67, 20,906.18 and 9,180.93 is: 12,670.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,148.67 : 20,906.18 = 9,180.93 : x
  2. Step 2: Convert to fraction form
    15,148.67/20,906.18 = 9,180.93/x
  3. Step 3: Cross multiply
    15,148.67x = 20,906.18 × 9,180.93
  4. Step 4: Simplify right side
    15,148.67x = 191,938,175.15
  5. Step 5: Solve for x
    x = 191,938,175.15/15,148.67
  6. Step 6: Final answer
    x = 12,670.30

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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.