Home / 21,020.18-31,531.71-6,228.50

Finding the Fourth Proportional to 21,020.18, 31,531.71 and 6,228.50

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Solution

The fourth proportional to 21,020.18, 31,531.71 and 6,228.50 is: 9,343.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,020.18 : 31,531.71 = 6,228.50 : x
  2. Step 2: Convert to fraction form
    21,020.18/31,531.71 = 6,228.50/x
  3. Step 3: Cross multiply
    21,020.18x = 31,531.71 × 6,228.50
  4. Step 4: Simplify right side
    21,020.18x = 196,395,255.74
  5. Step 5: Solve for x
    x = 196,395,255.74/21,020.18
  6. Step 6: Final answer
    x = 9,343.18

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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.