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Finding the Fourth Proportional to 8,655.50, 12,983.30 and 3,108.88

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Solution

The fourth proportional to 8,655.50, 12,983.30 and 3,108.88 is: 4,663.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,655.50 : 12,983.30 = 3,108.88 : x
  2. Step 2: Convert to fraction form
    8,655.50/12,983.30 = 3,108.88/x
  3. Step 3: Cross multiply
    8,655.50x = 12,983.30 × 3,108.88
  4. Step 4: Simplify right side
    8,655.50x = 40,363,521.70
  5. Step 5: Solve for x
    x = 40,363,521.70/8,655.50
  6. Step 6: Final answer
    x = 4,663.34

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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.