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Finding the Fourth Proportional to 12,416.80, 18,592.80 and 8,010.40

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Solution

The fourth proportional to 12,416.80, 18,592.80 and 8,010.40 is: 11,994.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,416.80 : 18,592.80 = 8,010.40 : x
  2. Step 2: Convert to fraction form
    12,416.80/18,592.80 = 8,010.40/x
  3. Step 3: Cross multiply
    12,416.80x = 18,592.80 × 8,010.40
  4. Step 4: Simplify right side
    12,416.80x = 148,935,765.12
  5. Step 5: Solve for x
    x = 148,935,765.12/12,416.80
  6. Step 6: Final answer
    x = 11,994.70

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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.