Home / 13,349.61-20,027.28-3,990.36

Finding the Fourth Proportional to 13,349.61, 20,027.28 and 3,990.36

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Solution

The fourth proportional to 13,349.61, 20,027.28 and 3,990.36 is: 5,986.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,349.61 : 20,027.28 = 3,990.36 : x
  2. Step 2: Convert to fraction form
    13,349.61/20,027.28 = 3,990.36/x
  3. Step 3: Cross multiply
    13,349.61x = 20,027.28 × 3,990.36
  4. Step 4: Simplify right side
    13,349.61x = 79,916,057.02
  5. Step 5: Solve for x
    x = 79,916,057.02/13,349.61
  6. Step 6: Final answer
    x = 5,986.40

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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.