Home / 21,209.38-31,813.74-5,199.07

Finding the Fourth Proportional to 21,209.38, 31,813.74 and 5,199.07

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Solution

The fourth proportional to 21,209.38, 31,813.74 and 5,199.07 is: 7,798.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,209.38 : 31,813.74 = 5,199.07 : x
  2. Step 2: Convert to fraction form
    21,209.38/31,813.74 = 5,199.07/x
  3. Step 3: Cross multiply
    21,209.38x = 31,813.74 × 5,199.07
  4. Step 4: Simplify right side
    21,209.38x = 165,401,861.22
  5. Step 5: Solve for x
    x = 165,401,861.22/21,209.38
  6. Step 6: Final answer
    x = 7,798.52

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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.