Home / 20,931.94-31,397.82-7,604.89

Finding the Fourth Proportional to 20,931.94, 31,397.82 and 7,604.89

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Solution

The fourth proportional to 20,931.94, 31,397.82 and 7,604.89 is: 11,407.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,931.94 : 31,397.82 = 7,604.89 : x
  2. Step 2: Convert to fraction form
    20,931.94/31,397.82 = 7,604.89/x
  3. Step 3: Cross multiply
    20,931.94x = 31,397.82 × 7,604.89
  4. Step 4: Simplify right side
    20,931.94x = 238,776,967.34
  5. Step 5: Solve for x
    x = 238,776,967.34/20,931.94
  6. Step 6: Final answer
    x = 11,407.30

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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.