Home / 13,690.40-20,543.70-9,983.30

Finding the Fourth Proportional to 13,690.40, 20,543.70 and 9,983.30

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Solution

The fourth proportional to 13,690.40, 20,543.70 and 9,983.30 is: 14,980.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,690.40 : 20,543.70 = 9,983.30 : x
  2. Step 2: Convert to fraction form
    13,690.40/20,543.70 = 9,983.30/x
  3. Step 3: Cross multiply
    13,690.40x = 20,543.70 × 9,983.30
  4. Step 4: Simplify right side
    13,690.40x = 205,093,920.21
  5. Step 5: Solve for x
    x = 205,093,920.21/13,690.40
  6. Step 6: Final answer
    x = 14,980.86

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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.