Home / 21,239.07-31,838.70-7,189.27

Finding the Fourth Proportional to 21,239.07, 31,838.70 and 7,189.27

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Solution

The fourth proportional to 21,239.07, 31,838.70 and 7,189.27 is: 10,777.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,239.07 : 31,838.70 = 7,189.27 : x
  2. Step 2: Convert to fraction form
    21,239.07/31,838.70 = 7,189.27/x
  3. Step 3: Cross multiply
    21,239.07x = 31,838.70 × 7,189.27
  4. Step 4: Simplify right side
    21,239.07x = 228,896,851.56
  5. Step 5: Solve for x
    x = 228,896,851.56/21,239.07
  6. Step 6: Final answer
    x = 10,777.16

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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.