Home / 12,820.75-19,205.57-8,424.88

Finding the Fourth Proportional to 12,820.75, 19,205.57 and 8,424.88

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Solution

The fourth proportional to 12,820.75, 19,205.57 and 8,424.88 is: 12,620.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,820.75 : 19,205.57 = 8,424.88 : x
  2. Step 2: Convert to fraction form
    12,820.75/19,205.57 = 8,424.88/x
  3. Step 3: Cross multiply
    12,820.75x = 19,205.57 × 8,424.88
  4. Step 4: Simplify right side
    12,820.75x = 161,804,595.63
  5. Step 5: Solve for x
    x = 161,804,595.63/12,820.75
  6. Step 6: Final answer
    x = 12,620.53

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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.