Home / 20,647.05-28,491.53-11,215.41

Finding the Fourth Proportional to 20,647.05, 28,491.53 and 11,215.41

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Solution

The fourth proportional to 20,647.05, 28,491.53 and 11,215.41 is: 15,476.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,647.05 : 28,491.53 = 11,215.41 : x
  2. Step 2: Convert to fraction form
    20,647.05/28,491.53 = 11,215.41/x
  3. Step 3: Cross multiply
    20,647.05x = 28,491.53 × 11,215.41
  4. Step 4: Simplify right side
    20,647.05x = 319,544,134.40
  5. Step 5: Solve for x
    x = 319,544,134.40/20,647.05
  6. Step 6: Final answer
    x = 15,476.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.