Home / 13,607.76-18,780.77-8,305.66

Finding the Fourth Proportional to 13,607.76, 18,780.77 and 8,305.66

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Solution

The fourth proportional to 13,607.76, 18,780.77 and 8,305.66 is: 11,463.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,607.76 : 18,780.77 = 8,305.66 : x
  2. Step 2: Convert to fraction form
    13,607.76/18,780.77 = 8,305.66/x
  3. Step 3: Cross multiply
    13,607.76x = 18,780.77 × 8,305.66
  4. Step 4: Simplify right side
    13,607.76x = 155,986,663.97
  5. Step 5: Solve for x
    x = 155,986,663.97/13,607.76
  6. Step 6: Final answer
    x = 11,463.07

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.