Home / 21,147.86-31,725.45-7,109.26

Finding the Fourth Proportional to 21,147.86, 31,725.45 and 7,109.26

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Solution

The fourth proportional to 21,147.86, 31,725.45 and 7,109.26 is: 10,665.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,147.86 : 31,725.45 = 7,109.26 : x
  2. Step 2: Convert to fraction form
    21,147.86/31,725.45 = 7,109.26/x
  3. Step 3: Cross multiply
    21,147.86x = 31,725.45 × 7,109.26
  4. Step 4: Simplify right side
    21,147.86x = 225,544,472.67
  5. Step 5: Solve for x
    x = 225,544,472.67/21,147.86
  6. Step 6: Final answer
    x = 10,665.12

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1.5x scale

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.