Home / 20,442.40-28,215.48-12,491.32

Finding the Fourth Proportional to 20,442.40, 28,215.48 and 12,491.32

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Solution

The fourth proportional to 20,442.40, 28,215.48 and 12,491.32 is: 17,241.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,442.40 : 28,215.48 = 12,491.32 : x
  2. Step 2: Convert to fraction form
    20,442.40/28,215.48 = 12,491.32/x
  3. Step 3: Cross multiply
    20,442.40x = 28,215.48 × 12,491.32
  4. Step 4: Simplify right side
    20,442.40x = 352,448,589.63
  5. Step 5: Solve for x
    x = 352,448,589.63/20,442.40
  6. Step 6: Final answer
    x = 17,241.06

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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.