Home / 13,990.50-20,985.81-5,670.68

Finding the Fourth Proportional to 13,990.50, 20,985.81 and 5,670.68

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Solution

The fourth proportional to 13,990.50, 20,985.81 and 5,670.68 is: 8,506.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,990.50 : 20,985.81 = 5,670.68 : x
  2. Step 2: Convert to fraction form
    13,990.50/20,985.81 = 5,670.68/x
  3. Step 3: Cross multiply
    13,990.50x = 20,985.81 × 5,670.68
  4. Step 4: Simplify right side
    13,990.50x = 119,003,708.12
  5. Step 5: Solve for x
    x = 119,003,708.12/13,990.50
  6. Step 6: Final answer
    x = 8,506.04

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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.