Home / 20,018.25-30,038.09-12,996.61

Finding the Fourth Proportional to 20,018.25, 30,038.09 and 12,996.61

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Solution

The fourth proportional to 20,018.25, 30,038.09 and 12,996.61 is: 19,501.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,018.25 : 30,038.09 = 12,996.61 : x
  2. Step 2: Convert to fraction form
    20,018.25/30,038.09 = 12,996.61/x
  3. Step 3: Cross multiply
    20,018.25x = 30,038.09 × 12,996.61
  4. Step 4: Simplify right side
    20,018.25x = 390,393,340.87
  5. Step 5: Solve for x
    x = 390,393,340.87/20,018.25
  6. Step 6: Final answer
    x = 19,501.87

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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.