Home / 21,130.22-31,684.70-7,085.36

Finding the Fourth Proportional to 21,130.22, 31,684.70 and 7,085.36

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Solution

The fourth proportional to 21,130.22, 31,684.70 and 7,085.36 is: 10,624.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,130.22 : 31,684.70 = 7,085.36 : x
  2. Step 2: Convert to fraction form
    21,130.22/31,684.70 = 7,085.36/x
  3. Step 3: Cross multiply
    21,130.22x = 31,684.70 × 7,085.36
  4. Step 4: Simplify right side
    21,130.22x = 224,497,505.99
  5. Step 5: Solve for x
    x = 224,497,505.99/21,130.22
  6. Step 6: Final answer
    x = 10,624.48

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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.