Home / 12,780.17-17,637.44-7,744.83

Finding the Fourth Proportional to 12,780.17, 17,637.44 and 7,744.83

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Solution

The fourth proportional to 12,780.17, 17,637.44 and 7,744.83 is: 10,688.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.17 : 17,637.44 = 7,744.83 : x
  2. Step 2: Convert to fraction form
    12,780.17/17,637.44 = 7,744.83/x
  3. Step 3: Cross multiply
    12,780.17x = 17,637.44 × 7,744.83
  4. Step 4: Simplify right side
    12,780.17x = 136,598,974.44
  5. Step 5: Solve for x
    x = 136,598,974.44/12,780.17
  6. Step 6: Final answer
    x = 10,688.35

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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.