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Finding the Fourth Proportional to 18,688.70, 28,033.14 and 4,837.70

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Solution

The fourth proportional to 18,688.70, 28,033.14 and 4,837.70 is: 7,256.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,688.70 : 28,033.14 = 4,837.70 : x
  2. Step 2: Convert to fraction form
    18,688.70/28,033.14 = 4,837.70/x
  3. Step 3: Cross multiply
    18,688.70x = 28,033.14 × 4,837.70
  4. Step 4: Simplify right side
    18,688.70x = 135,615,781.21
  5. Step 5: Solve for x
    x = 135,615,781.21/18,688.70
  6. Step 6: Final answer
    x = 7,256.57

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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.