Home / 20,981.48-31,450.18-10,571.40

Finding the Fourth Proportional to 20,981.48, 31,450.18 and 10,571.40

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Solution

The fourth proportional to 20,981.48, 31,450.18 and 10,571.40 is: 15,846.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,981.48 : 31,450.18 = 10,571.40 : x
  2. Step 2: Convert to fraction form
    20,981.48/31,450.18 = 10,571.40/x
  3. Step 3: Cross multiply
    20,981.48x = 31,450.18 × 10,571.40
  4. Step 4: Simplify right side
    20,981.48x = 332,472,432.85
  5. Step 5: Solve for x
    x = 332,472,432.85/20,981.48
  6. Step 6: Final answer
    x = 15,846.00

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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.