Home / 20,491.51-30,689.42-15,774.09

Finding the Fourth Proportional to 20,491.51, 30,689.42 and 15,774.09

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Solution

The fourth proportional to 20,491.51, 30,689.42 and 15,774.09 is: 23,624.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,491.51 : 30,689.42 = 15,774.09 : x
  2. Step 2: Convert to fraction form
    20,491.51/30,689.42 = 15,774.09/x
  3. Step 3: Cross multiply
    20,491.51x = 30,689.42 × 15,774.09
  4. Step 4: Simplify right side
    20,491.51x = 484,097,440.81
  5. Step 5: Solve for x
    x = 484,097,440.81/20,491.51
  6. Step 6: Final answer
    x = 23,624.30

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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.