Home / 12,822.60-19,233.90-7,811.40

Finding the Fourth Proportional to 12,822.60, 19,233.90 and 7,811.40

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Solution

The fourth proportional to 12,822.60, 19,233.90 and 7,811.40 is: 11,717.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,822.60 : 19,233.90 = 7,811.40 : x
  2. Step 2: Convert to fraction form
    12,822.60/19,233.90 = 7,811.40/x
  3. Step 3: Cross multiply
    12,822.60x = 19,233.90 × 7,811.40
  4. Step 4: Simplify right side
    12,822.60x = 150,243,686.46
  5. Step 5: Solve for x
    x = 150,243,686.46/12,822.60
  6. Step 6: Final answer
    x = 11,717.10

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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.