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Finding the Fourth Proportional to 13,038, 17,989.96 and 7,730.88

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Solution

The fourth proportional to 13,038, 17,989.96 and 7,730.88 is: 10,667.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,038 : 17,989.96 = 7,730.88 : x
  2. Step 2: Convert to fraction form
    13,038/17,989.96 = 7,730.88/x
  3. Step 3: Cross multiply
    13,038x = 17,989.96 × 7,730.88
  4. Step 4: Simplify right side
    13,038x = 139,078,221.96
  5. Step 5: Solve for x
    x = 139,078,221.96/13,038
  6. Step 6: Final answer
    x = 10,667.14

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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.