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Finding the Fourth Proportional to 8,663.18, 12,971.30 and 4,494.45

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Solution

The fourth proportional to 8,663.18, 12,971.30 and 4,494.45 is: 6,729.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,663.18 : 12,971.30 = 4,494.45 : x
  2. Step 2: Convert to fraction form
    8,663.18/12,971.30 = 4,494.45/x
  3. Step 3: Cross multiply
    8,663.18x = 12,971.30 × 4,494.45
  4. Step 4: Simplify right side
    8,663.18x = 58,298,836.81
  5. Step 5: Solve for x
    x = 58,298,836.81/8,663.18
  6. Step 6: Final answer
    x = 6,729.50

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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.