Home / 5,227.78-7,209.90-3,720.40

Finding the Fourth Proportional to 5,227.78, 7,209.90 and 3,720.40

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Solution

The fourth proportional to 5,227.78, 7,209.90 and 3,720.40 is: 5,130.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,227.78 : 7,209.90 = 3,720.40 : x
  2. Step 2: Convert to fraction form
    5,227.78/7,209.90 = 3,720.40/x
  3. Step 3: Cross multiply
    5,227.78x = 7,209.90 × 3,720.40
  4. Step 4: Simplify right side
    5,227.78x = 26,823,711.96
  5. Step 5: Solve for x
    x = 26,823,711.96/5,227.78
  6. Step 6: Final answer
    x = 5,130.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.