Home / 13,990.32-20,985.89-3,602.07

Finding the Fourth Proportional to 13,990.32, 20,985.89 and 3,602.07

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Solution

The fourth proportional to 13,990.32, 20,985.89 and 3,602.07 is: 5,403.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.32 : 20,985.89 = 3,602.07 : x
  2. Step 2: Convert to fraction form
    13,990.32/20,985.89 = 3,602.07/x
  3. Step 3: Cross multiply
    13,990.32x = 20,985.89 × 3,602.07
  4. Step 4: Simplify right side
    13,990.32x = 75,592,626.78
  5. Step 5: Solve for x
    x = 75,592,626.78/13,990.32
  6. Step 6: Final answer
    x = 5,403.21

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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.