Home / 20,717.99-31,108.14-12,435.07

Finding the Fourth Proportional to 20,717.99, 31,108.14 and 12,435.07

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Solution

The fourth proportional to 20,717.99, 31,108.14 and 12,435.07 is: 18,671.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,717.99 : 31,108.14 = 12,435.07 : x
  2. Step 2: Convert to fraction form
    20,717.99/31,108.14 = 12,435.07/x
  3. Step 3: Cross multiply
    20,717.99x = 31,108.14 × 12,435.07
  4. Step 4: Simplify right side
    20,717.99x = 386,831,861.54
  5. Step 5: Solve for x
    x = 386,831,861.54/20,717.99
  6. Step 6: Final answer
    x = 18,671.30

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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.