Home / 12,780.21-17,634.73-7,328.50

Finding the Fourth Proportional to 12,780.21, 17,634.73 and 7,328.50

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Solution

The fourth proportional to 12,780.21, 17,634.73 and 7,328.50 is: 10,112.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,780.21 : 17,634.73 = 7,328.50 : x
  2. Step 2: Convert to fraction form
    12,780.21/17,634.73 = 7,328.50/x
  3. Step 3: Cross multiply
    12,780.21x = 17,634.73 × 7,328.50
  4. Step 4: Simplify right side
    12,780.21x = 129,236,118.81
  5. Step 5: Solve for x
    x = 129,236,118.81/12,780.21
  6. Step 6: Final answer
    x = 10,112.21

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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.