Home / 21,159.24-31,739.10-7,305

Finding the Fourth Proportional to 21,159.24, 31,739.10 and 7,305

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Solution

The fourth proportional to 21,159.24, 31,739.10 and 7,305 is: 10,957.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,159.24 : 31,739.10 = 7,305 : x
  2. Step 2: Convert to fraction form
    21,159.24/31,739.10 = 7,305/x
  3. Step 3: Cross multiply
    21,159.24x = 31,739.10 × 7,305
  4. Step 4: Simplify right side
    21,159.24x = 231,854,125.50
  5. Step 5: Solve for x
    x = 231,854,125.50/21,159.24
  6. Step 6: Final answer
    x = 10,957.58

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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.