Home / 20,929.22-31,393.76-13,143.50

Finding the Fourth Proportional to 20,929.22, 31,393.76 and 13,143.50

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Solution

The fourth proportional to 20,929.22, 31,393.76 and 13,143.50 is: 19,715.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,929.22 : 31,393.76 = 13,143.50 : x
  2. Step 2: Convert to fraction form
    20,929.22/31,393.76 = 13,143.50/x
  3. Step 3: Cross multiply
    20,929.22x = 31,393.76 × 13,143.50
  4. Step 4: Simplify right side
    20,929.22x = 412,623,884.56
  5. Step 5: Solve for x
    x = 412,623,884.56/20,929.22
  6. Step 6: Final answer
    x = 19,715.21

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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.