Home / 12,822.76-19,217.40-7,278.58

Finding the Fourth Proportional to 12,822.76, 19,217.40 and 7,278.58

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Solution

The fourth proportional to 12,822.76, 19,217.40 and 7,278.58 is: 10,908.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,822.76 : 19,217.40 = 7,278.58 : x
  2. Step 2: Convert to fraction form
    12,822.76/19,217.40 = 7,278.58/x
  3. Step 3: Cross multiply
    12,822.76x = 19,217.40 × 7,278.58
  4. Step 4: Simplify right side
    12,822.76x = 139,875,383.29
  5. Step 5: Solve for x
    x = 139,875,383.29/12,822.76
  6. Step 6: Final answer
    x = 10,908.37

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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.