Home / 20,966.74-31,435.53-7,815.58

Finding the Fourth Proportional to 20,966.74, 31,435.53 and 7,815.58

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Solution

The fourth proportional to 20,966.74, 31,435.53 and 7,815.58 is: 11,717.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,966.74 : 31,435.53 = 7,815.58 : x
  2. Step 2: Convert to fraction form
    20,966.74/31,435.53 = 7,815.58/x
  3. Step 3: Cross multiply
    20,966.74x = 31,435.53 × 7,815.58
  4. Step 4: Simplify right side
    20,966.74x = 245,686,899.56
  5. Step 5: Solve for x
    x = 245,686,899.56/20,966.74
  6. Step 6: Final answer
    x = 11,717.94

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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.