Home / 21,000.36-31,483.53-7,850.82

Finding the Fourth Proportional to 21,000.36, 31,483.53 and 7,850.82

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Solution

The fourth proportional to 21,000.36, 31,483.53 and 7,850.82 is: 11,769.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,000.36 : 31,483.53 = 7,850.82 : x
  2. Step 2: Convert to fraction form
    21,000.36/31,483.53 = 7,850.82/x
  3. Step 3: Cross multiply
    21,000.36x = 31,483.53 × 7,850.82
  4. Step 4: Simplify right side
    21,000.36x = 247,171,526.99
  5. Step 5: Solve for x
    x = 247,171,526.99/21,000.36
  6. Step 6: Final answer
    x = 11,769.87

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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.