Home / 21,203.39-31,782.93-7,158.57

Finding the Fourth Proportional to 21,203.39, 31,782.93 and 7,158.57

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Solution

The fourth proportional to 21,203.39, 31,782.93 and 7,158.57 is: 10,730.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,203.39 : 31,782.93 = 7,158.57 : x
  2. Step 2: Convert to fraction form
    21,203.39/31,782.93 = 7,158.57/x
  3. Step 3: Cross multiply
    21,203.39x = 31,782.93 × 7,158.57
  4. Step 4: Simplify right side
    21,203.39x = 227,520,329.21
  5. Step 5: Solve for x
    x = 227,520,329.21/21,203.39
  6. Step 6: Final answer
    x = 10,730.38

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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.