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Finding the Fourth Proportional to 13,098.96, 18,070.64 and 7,790.88

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Solution

The fourth proportional to 13,098.96, 18,070.64 and 7,790.88 is: 10,747.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,098.96 : 18,070.64 = 7,790.88 : x
  2. Step 2: Convert to fraction form
    13,098.96/18,070.64 = 7,790.88/x
  3. Step 3: Cross multiply
    13,098.96x = 18,070.64 × 7,790.88
  4. Step 4: Simplify right side
    13,098.96x = 140,786,187.76
  5. Step 5: Solve for x
    x = 140,786,187.76/13,098.96
  6. Step 6: Final answer
    x = 10,747.89

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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.