Home / 20,981.30-31,439.54-10,600.34

Finding the Fourth Proportional to 20,981.30, 31,439.54 and 10,600.34

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Solution

The fourth proportional to 20,981.30, 31,439.54 and 10,600.34 is: 15,884.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.30 : 31,439.54 = 10,600.34 : x
  2. Step 2: Convert to fraction form
    20,981.30/31,439.54 = 10,600.34/x
  3. Step 3: Cross multiply
    20,981.30x = 31,439.54 × 10,600.34
  4. Step 4: Simplify right side
    20,981.30x = 333,269,682.75
  5. Step 5: Solve for x
    x = 333,269,682.75/20,981.30
  6. Step 6: Final answer
    x = 15,884.13

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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.