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Finding the Fourth Proportional to 8,905.80, 13,358.70 and 8,776.20

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Solution

The fourth proportional to 8,905.80, 13,358.70 and 8,776.20 is: 13,164.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,905.80 : 13,358.70 = 8,776.20 : x
  2. Step 2: Convert to fraction form
    8,905.80/13,358.70 = 8,776.20/x
  3. Step 3: Cross multiply
    8,905.80x = 13,358.70 × 8,776.20
  4. Step 4: Simplify right side
    8,905.80x = 117,238,622.94
  5. Step 5: Solve for x
    x = 117,238,622.94/8,905.80
  6. Step 6: Final answer
    x = 13,164.30

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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.