Home / 13,187.20-19,795.20-8,262.40

Finding the Fourth Proportional to 13,187.20, 19,795.20 and 8,262.40

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Solution

The fourth proportional to 13,187.20, 19,795.20 and 8,262.40 is: 12,402.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,187.20 : 19,795.20 = 8,262.40 : x
  2. Step 2: Convert to fraction form
    13,187.20/19,795.20 = 8,262.40/x
  3. Step 3: Cross multiply
    13,187.20x = 19,795.20 × 8,262.40
  4. Step 4: Simplify right side
    13,187.20x = 163,555,860.48
  5. Step 5: Solve for x
    x = 163,555,860.48/13,187.20
  6. Step 6: Final answer
    x = 12,402.62

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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.