Home / 21,300.90-31,950.18-6,509.81

Finding the Fourth Proportional to 21,300.90, 31,950.18 and 6,509.81

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Solution

The fourth proportional to 21,300.90, 31,950.18 and 6,509.81 is: 9,764.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,300.90 : 31,950.18 = 6,509.81 : x
  2. Step 2: Convert to fraction form
    21,300.90/31,950.18 = 6,509.81/x
  3. Step 3: Cross multiply
    21,300.90x = 31,950.18 × 6,509.81
  4. Step 4: Simplify right side
    21,300.90x = 207,989,625.68
  5. Step 5: Solve for x
    x = 207,989,625.68/21,300.90
  6. Step 6: Final answer
    x = 9,764.36

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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.