Home / 20,849.88-31,259.20-7,699.80

Finding the Fourth Proportional to 20,849.88, 31,259.20 and 7,699.80

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Solution

The fourth proportional to 20,849.88, 31,259.20 and 7,699.80 is: 11,543.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,849.88 : 31,259.20 = 7,699.80 : x
  2. Step 2: Convert to fraction form
    20,849.88/31,259.20 = 7,699.80/x
  3. Step 3: Cross multiply
    20,849.88x = 31,259.20 × 7,699.80
  4. Step 4: Simplify right side
    20,849.88x = 240,689,588.16
  5. Step 5: Solve for x
    x = 240,689,588.16/20,849.88
  6. Step 6: Final answer
    x = 11,543.93

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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.