Home / 21,289.43-31,938.84-6,499.51

Finding the Fourth Proportional to 21,289.43, 31,938.84 and 6,499.51

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Solution

The fourth proportional to 21,289.43, 31,938.84 and 6,499.51 is: 9,750.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,289.43 : 31,938.84 = 6,499.51 : x
  2. Step 2: Convert to fraction form
    21,289.43/31,938.84 = 6,499.51/x
  3. Step 3: Cross multiply
    21,289.43x = 31,938.84 × 6,499.51
  4. Step 4: Simplify right side
    21,289.43x = 207,586,730.12
  5. Step 5: Solve for x
    x = 207,586,730.12/21,289.43
  6. Step 6: Final answer
    x = 9,750.69

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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.