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Finding the Fourth Proportional to 8,973.34, 13,439.14 and 8,661.88

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Solution

The fourth proportional to 8,973.34, 13,439.14 and 8,661.88 is: 12,972.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,973.34 : 13,439.14 = 8,661.88 : x
  2. Step 2: Convert to fraction form
    8,973.34/13,439.14 = 8,661.88/x
  3. Step 3: Cross multiply
    8,973.34x = 13,439.14 × 8,661.88
  4. Step 4: Simplify right side
    8,973.34x = 116,408,217.98
  5. Step 5: Solve for x
    x = 116,408,217.98/8,973.34
  6. Step 6: Final answer
    x = 12,972.67

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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.