Home / 15,419.90-21,257.19-10,105.49

Finding the Fourth Proportional to 15,419.90, 21,257.19 and 10,105.49

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Solution

The fourth proportional to 15,419.90, 21,257.19 and 10,105.49 is: 13,930.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,419.90 : 21,257.19 = 10,105.49 : x
  2. Step 2: Convert to fraction form
    15,419.90/21,257.19 = 10,105.49/x
  3. Step 3: Cross multiply
    15,419.90x = 21,257.19 × 10,105.49
  4. Step 4: Simplify right side
    15,419.90x = 214,814,374.12
  5. Step 5: Solve for x
    x = 214,814,374.12/15,419.90
  6. Step 6: Final answer
    x = 13,930.98

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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.