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Finding the Fourth Proportional to 12,670.53, 18,999.31 and 6,750.74

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Solution

The fourth proportional to 12,670.53, 18,999.31 and 6,750.74 is: 10,122.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,670.53 : 18,999.31 = 6,750.74 : x
  2. Step 2: Convert to fraction form
    12,670.53/18,999.31 = 6,750.74/x
  3. Step 3: Cross multiply
    12,670.53x = 18,999.31 × 6,750.74
  4. Step 4: Simplify right side
    12,670.53x = 128,259,445.27
  5. Step 5: Solve for x
    x = 128,259,445.27/12,670.53
  6. Step 6: Final answer
    x = 10,122.66

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.