Home / 20,839.74-31,262.85-6,985.50

Finding the Fourth Proportional to 20,839.74, 31,262.85 and 6,985.50

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Solution

The fourth proportional to 20,839.74, 31,262.85 and 6,985.50 is: 10,479.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,839.74 : 31,262.85 = 6,985.50 : x
  2. Step 2: Convert to fraction form
    20,839.74/31,262.85 = 6,985.50/x
  3. Step 3: Cross multiply
    20,839.74x = 31,262.85 × 6,985.50
  4. Step 4: Simplify right side
    20,839.74x = 218,386,638.68
  5. Step 5: Solve for x
    x = 218,386,638.68/20,839.74
  6. Step 6: Final answer
    x = 10,479.34

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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.