Home / 21,292.57-31,906-13,484.98

Finding the Fourth Proportional to 21,292.57, 31,906 and 13,484.98

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Solution

The fourth proportional to 21,292.57, 31,906 and 13,484.98 is: 20,206.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,292.57 : 31,906 = 13,484.98 : x
  2. Step 2: Convert to fraction form
    21,292.57/31,906 = 13,484.98/x
  3. Step 3: Cross multiply
    21,292.57x = 31,906 × 13,484.98
  4. Step 4: Simplify right side
    21,292.57x = 430,251,771.88
  5. Step 5: Solve for x
    x = 430,251,771.88/21,292.57
  6. Step 6: Final answer
    x = 20,206.66

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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.