Home / 20,840.74-31,264.35-6,986.50

Finding the Fourth Proportional to 20,840.74, 31,264.35 and 6,986.50

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Solution

The fourth proportional to 20,840.74, 31,264.35 and 6,986.50 is: 10,480.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,840.74 : 31,264.35 = 6,986.50 : x
  2. Step 2: Convert to fraction form
    20,840.74/31,264.35 = 6,986.50/x
  3. Step 3: Cross multiply
    20,840.74x = 31,264.35 × 6,986.50
  4. Step 4: Simplify right side
    20,840.74x = 218,428,381.28
  5. Step 5: Solve for x
    x = 218,428,381.28/20,840.74
  6. Step 6: Final answer
    x = 10,480.84

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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.