Home / 13,430.56-20,145.84-5,108.66

Finding the Fourth Proportional to 13,430.56, 20,145.84 and 5,108.66

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Solution

The fourth proportional to 13,430.56, 20,145.84 and 5,108.66 is: 7,662.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,430.56 : 20,145.84 = 5,108.66 : x
  2. Step 2: Convert to fraction form
    13,430.56/20,145.84 = 5,108.66/x
  3. Step 3: Cross multiply
    13,430.56x = 20,145.84 × 5,108.66
  4. Step 4: Simplify right side
    13,430.56x = 102,918,146.25
  5. Step 5: Solve for x
    x = 102,918,146.25/13,430.56
  6. Step 6: Final answer
    x = 7,662.98

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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.