Home / 21,018.72-31,531.15-6,225.71

Finding the Fourth Proportional to 21,018.72, 31,531.15 and 6,225.71

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Solution

The fourth proportional to 21,018.72, 31,531.15 and 6,225.71 is: 9,339.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.72 : 31,531.15 = 6,225.71 : x
  2. Step 2: Convert to fraction form
    21,018.72/31,531.15 = 6,225.71/x
  3. Step 3: Cross multiply
    21,018.72x = 31,531.15 × 6,225.71
  4. Step 4: Simplify right side
    21,018.72x = 196,303,805.85
  5. Step 5: Solve for x
    x = 196,303,805.85/21,018.72
  6. Step 6: Final answer
    x = 9,339.48

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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.