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Finding the Fourth Proportional to 8,486.30, 12,705.15 and 8,486.30

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Solution

The fourth proportional to 8,486.30, 12,705.15 and 8,486.30 is: 12,705.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,486.30 : 12,705.15 = 8,486.30 : x
  2. Step 2: Convert to fraction form
    8,486.30/12,705.15 = 8,486.30/x
  3. Step 3: Cross multiply
    8,486.30x = 12,705.15 × 8,486.30
  4. Step 4: Simplify right side
    8,486.30x = 107,819,714.45
  5. Step 5: Solve for x
    x = 107,819,714.45/8,486.30
  6. Step 6: Final answer
    x = 12,705.15

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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.