Home / 31,620.88-47,431.11-12,900.82

Finding the Fourth Proportional to 31,620.88, 47,431.11 and 12,900.82

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Solution

The fourth proportional to 31,620.88, 47,431.11 and 12,900.82 is: 19,351.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,620.88 : 47,431.11 = 12,900.82 : x
  2. Step 2: Convert to fraction form
    31,620.88/47,431.11 = 12,900.82/x
  3. Step 3: Cross multiply
    31,620.88x = 47,431.11 × 12,900.82
  4. Step 4: Simplify right side
    31,620.88x = 611,900,212.51
  5. Step 5: Solve for x
    x = 611,900,212.51/31,620.88
  6. Step 6: Final answer
    x = 19,351.14

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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.