Home / 13,985.56-20,975.08-4,122.20

Finding the Fourth Proportional to 13,985.56, 20,975.08 and 4,122.20

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Solution

The fourth proportional to 13,985.56, 20,975.08 and 4,122.20 is: 6,182.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,985.56 : 20,975.08 = 4,122.20 : x
  2. Step 2: Convert to fraction form
    13,985.56/20,975.08 = 4,122.20/x
  3. Step 3: Cross multiply
    13,985.56x = 20,975.08 × 4,122.20
  4. Step 4: Simplify right side
    13,985.56x = 86,463,474.78
  5. Step 5: Solve for x
    x = 86,463,474.78/13,985.56
  6. Step 6: Final answer
    x = 6,182.34

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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.