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Finding the Fourth Proportional to 18,697.89, 28,060.74 and 8,840.19

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Solution

The fourth proportional to 18,697.89, 28,060.74 and 8,840.19 is: 13,266.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,697.89 : 28,060.74 = 8,840.19 : x
  2. Step 2: Convert to fraction form
    18,697.89/28,060.74 = 8,840.19/x
  3. Step 3: Cross multiply
    18,697.89x = 28,060.74 × 8,840.19
  4. Step 4: Simplify right side
    18,697.89x = 248,062,273.14
  5. Step 5: Solve for x
    x = 248,062,273.14/18,697.89
  6. Step 6: Final answer
    x = 13,266.86

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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.