Home / 13,742.90-20,610.30-5,420.15

Finding the Fourth Proportional to 13,742.90, 20,610.30 and 5,420.15

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Solution

The fourth proportional to 13,742.90, 20,610.30 and 5,420.15 is: 8,128.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,742.90 : 20,610.30 = 5,420.15 : x
  2. Step 2: Convert to fraction form
    13,742.90/20,610.30 = 5,420.15/x
  3. Step 3: Cross multiply
    13,742.90x = 20,610.30 × 5,420.15
  4. Step 4: Simplify right side
    13,742.90x = 111,710,917.55
  5. Step 5: Solve for x
    x = 111,710,917.55/13,742.90
  6. Step 6: Final answer
    x = 8,128.63

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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.