Home / 13,905.03-20,853.90-5,142.45

Finding the Fourth Proportional to 13,905.03, 20,853.90 and 5,142.45

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Solution

The fourth proportional to 13,905.03, 20,853.90 and 5,142.45 is: 7,712.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,905.03 : 20,853.90 = 5,142.45 : x
  2. Step 2: Convert to fraction form
    13,905.03/20,853.90 = 5,142.45/x
  3. Step 3: Cross multiply
    13,905.03x = 20,853.90 × 5,142.45
  4. Step 4: Simplify right side
    13,905.03x = 107,240,138.06
  5. Step 5: Solve for x
    x = 107,240,138.06/13,905.03
  6. Step 6: Final answer
    x = 7,712.33

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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.