Home / 20,790.40-31,106.88-11,562.88

Finding the Fourth Proportional to 20,790.40, 31,106.88 and 11,562.88

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Solution

The fourth proportional to 20,790.40, 31,106.88 and 11,562.88 is: 17,300.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,790.40 : 31,106.88 = 11,562.88 : x
  2. Step 2: Convert to fraction form
    20,790.40/31,106.88 = 11,562.88/x
  3. Step 3: Cross multiply
    20,790.40x = 31,106.88 × 11,562.88
  4. Step 4: Simplify right side
    20,790.40x = 359,685,120.61
  5. Step 5: Solve for x
    x = 359,685,120.61/20,790.40
  6. Step 6: Final answer
    x = 17,300.54

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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.