Home / 12,900.11-17,799.45-8,430.43

Finding the Fourth Proportional to 12,900.11, 17,799.45 and 8,430.43

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Solution

The fourth proportional to 12,900.11, 17,799.45 and 8,430.43 is: 11,632.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,900.11 : 17,799.45 = 8,430.43 : x
  2. Step 2: Convert to fraction form
    12,900.11/17,799.45 = 8,430.43/x
  3. Step 3: Cross multiply
    12,900.11x = 17,799.45 × 8,430.43
  4. Step 4: Simplify right side
    12,900.11x = 150,056,974.52
  5. Step 5: Solve for x
    x = 150,056,974.52/12,900.11
  6. Step 6: Final answer
    x = 11,632.22

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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.