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Finding the Fourth Proportional to 18,688.60, 28,034.94 and 9,330.96

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Solution

The fourth proportional to 18,688.60, 28,034.94 and 9,330.96 is: 13,997.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688.60 : 28,034.94 = 9,330.96 : x
  2. Step 2: Convert to fraction form
    18,688.60/28,034.94 = 9,330.96/x
  3. Step 3: Cross multiply
    18,688.60x = 28,034.94 × 9,330.96
  4. Step 4: Simplify right side
    18,688.60x = 261,592,903.74
  5. Step 5: Solve for x
    x = 261,592,903.74/18,688.60
  6. Step 6: Final answer
    x = 13,997.46

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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.