Home / 12,780.77-19,165.07-4,459.77

Finding the Fourth Proportional to 12,780.77, 19,165.07 and 4,459.77

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Solution

The fourth proportional to 12,780.77, 19,165.07 and 4,459.77 is: 6,687.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.77 : 19,165.07 = 4,459.77 : x
  2. Step 2: Convert to fraction form
    12,780.77/19,165.07 = 4,459.77/x
  3. Step 3: Cross multiply
    12,780.77x = 19,165.07 × 4,459.77
  4. Step 4: Simplify right side
    12,780.77x = 85,471,781.94
  5. Step 5: Solve for x
    x = 85,471,781.94/12,780.77
  6. Step 6: Final answer
    x = 6,687.53

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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.